At pubcon I listened to a session by George Aspland about various techniques to optimize PDF files for search engines. Part of his ongoing research is to see whether links within a PDF file pass link juice. To test this, he asked if session members would download and republish one of his PDF files. So here it is. Good luck, it will be interesting to see the results of this test.
Optimizing PDFs for Search Engines (1.8MB PDF file)