Via Threatpost:

By Tomer Bitton, Security Research, Imperva

PDFs are widely used business file format, which makes them a common target for malware attacks. On the surface, PDFs are secure, but because they have so many “features,” hackers have learned how to hide attacks deep under the surface.

By using a number of utilities, we are able to reverse engineer the techniques in malicious PDFs, providing insight that we can ultimately use to better protect our systems.