Intego:

A recent malware distribution campaign dubbed “VeryMal” leverages an ancient technique called steganography—the hiding of secret information in plain sight—to distribute Mac malware.

Why go to all this trouble? In theory, using steganography or other obfuscation techniques makes it more difficult for endpoint protection and network monitoring software to determine that something suspicious might be happening.

Obviously, this is a bit of self-serving from the folks at Intego but it does serve as a reminder – don’t install any aspect of Adobe’s Flash software.