Solutions for PDF embedding?

Background: We run several websites for classified ads. One of them gets some of the ads from an external source as PDF files. We know PDFs aren't ideal, but we have to deal with them somehow.

Question: Is there any good way to embed PDFs? Or an other smart way to handle it? (at the moment we have a short explanation and link to the original PDF - but that's not very elegant...).

Remarks: I tested embedding in several browsers and they all seem to handle it differently. Also I can't find any stats on PDF reader plugin penetration (plus there are other plugins like Foxit Reader; Chrome even has bult in PDF support).