Facebook does not offer an easy way to post Adobe Portable Document Format (PDF) files. However, there are several options that allow you to place a PDF, or the contents of a PDF, on a Facebook ...

You can only upload a PDF to Facebook groups and business pages, unless you convert the PDF to an image file.

Adding a PDF to a Facebook Post. Involver's Scribd Facebook application lets you post PDF files to your Facebook business page to provide read-only documents for your company's customers.