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The researchers also found that certified Adobe documents can execute JavaScript code, such as accessing URLs to verify the identity of a user вЂ“ attackers could use this mechanism to add malicious code to a certified PDF document. 11 applications even had PDF certification specifications implemented incorrectly. Out of 26 PDF applications tested, in 24 were vulnerable to attack. Two new attacks вЂ“ called Sneaky Signature Attack (SSA) and Evil Annotation Attack (EAA) вЂ“ enabled researchers to display fake content in a signed Adobe PDF document instead of the certified content, without rendering the certification invalid or triggering a warning from the PDF applications. PDF Digital Signatures broken again with two new attacks PDFs can also be altered after signing to trick PDF viewers into displaying content that looks different to the one that was signed.ДЄdobe Acrobat PDF Security Vulnerabilities PDF Digital Signatures вЂ“ due to weaknesses in signature validation algorithms, PDF documents can be altered without them being reported as tampered with. Since the PDF specification allows the mixing of ciphertexts with plaintexts, this can be used in combination with other PDF features which allow the loading of external resources via HTTP, enabling an attacker to run direct exfiltration attacks to gain access to the PDF content once a victim opens a PDF file. An attacker can modify the structure of encrypted PDF documents, add unencrypted objects, or wrap encrypted parts into a context controlled by the attacker. PDF Encryption вЂ“ there is no integrity protection. PDF Encryption & Digital Signature Weaknesses Adobe announced a strengthening of their DRM system in 2014 but there are many ebook DRM removal companies claiming to easily remove Adobe Digital Editions DRM.

In 2009 Adobe Digital Editions DRM was broken by iв™Ґcabbages allowing users to remove the DRM protection from Adobe ebooks вЂ“ вЂњThere is very little obfuscation in how Adobe Digital Editions hides and encrypts the per-user RSA key, allowing fairly simple duplication of exactly the same process Digital Editions uses to retrieve it.вЂќ. The security strength and weakness of the investigated e-book systems are analyzed and presented.ДЄdobe Digital Editions Digital Rights ManagementДЄdobe has been plagued with poor implementations of DRM security for PDF files and EPUB ebooks and reports of spying on user activity. This paper makes a survey on main e-book standards, application architectures and security mechanisms. This article covers how PDF files execute code, JavaScript security issues, and how login credentials can be easily stolen. So how do you protect yourself from PDF security attacks? This article explains how adopting an acceptable usage policy and disabling JavaScript can help.ДЄdobe says вЂњOne of the easiest and most powerful ways to customize PDF files is by using JavaScriptвЂќ but it can leave systems open to easy attacks. PDF security attacks account for 28% of all malware It shows why it is essential that JavaScript is disabled in Acrobat if you want to protect yourself against malware attacks. This paper covers the security analysis of the PDF format and malware attacks.

This paper discusses the flaws in the Acrobat Standard Security handler. If you think PDF plug-ins canвЂ™t compromise your security then perhaps you should read this. If the PDF security solution you decide on can be circumvented by simple means, or is complex to setup and use then you might want to look elsewhere. This paper explains the current pitfalls of PDF security.

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They encrypt the content of a PDF file and hope that no one figures out how to decrypt it.вЂќ This paper explains how Adobe encrypts PDF files.ДЎ0 things you really wished you had known about PDF DRM, but they didnвЂ™t tell you вЂњAdobeвЂ™s PDF protection scheme is a classic example of security through obscurity.

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This paper explains how to bypass Adobe PDF Security using a Mac computer. Bypassing Adobe Security controls on the Mac

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