Once the user executes the malware, it puts the malicious PDF on the user’s machine and then opens it as a way to hide the malicious activity that’s going on in the background, according to an analysis by researchers at F-Secure. The new piece of malware hides inside a PDF file and delivers a backdoor that hides on the user’s machine once the malicious file is opened. Researchers have come across a sample of an OS X-based Trojan that disguises itself as a PDF file, a technique that’s been in favor among Windows malware authors for several years now. Malware that targets Mac OS X isn’t anywhere near catching up to Windows-based malware in terms of volume and variety, but it seems that OS X malware may be adopting some of the more successful tactics that Windows viruses have been using to trick users.
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