Tag: jpeg
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Paper: Script in a lossy stream
Dénes Óvári explains how to store code in lossily compressed JPEG data. Malformed PDFs have become a common way to deliver malware. Naturally, when this started to happen, anti-virus products began scanning inside PDF files for traces of malicious code and, equally naturally, malware authors started to obfuscate that code to circumvent scanners. Not everything…