Artifex has a public suite of PDF files here: http://git.ghostscript.com/?p=tests.git;a=tree;f=pdf;h=2ce4fde3dd5045efe571291ec0483e19aaf5b5ef;hb=HEAD http://gi

Artifex has a public suite of PDF files here: http://git.ghostscript.com/?p=tests.git;a=tree;f=pdf;h=2ce4fde3dd5045efe571291ec0483e19aaf5b5ef;hb=HEAD http://git.ghostscript.com/?p=tests.git;a=tree;f=pdf;h=2ce4f... They're not all malformed, and they're mostly used for snapshot testing, but they cover a wide range of corner cases.