PDF Analysis

For future reference: this Stack Exchange question asks how best to scan a PDF for malware. There are a number of links suggested:

• Wepawet (online tool, papers available, proprietary code)
• PDF Tools by Didier Stevens
• A SANS.org blog post on using pdfid.py from PDF tools, and another on using pyew
• A blog post by Brandon Dixon on the topic

I've got some reading to do.