Adding a pdf to a page?

I sell a large, long term brand of supplements. For some products, the company designs a 2 page client handout pdf. Some doctors have these pdfs published on their site - and maybe 20% of the time - these pdfs rank on the first page of search results. The pdf documents are all original writing, no duplicate content on product pages.

Q = Would adding these client handouts to my pages show the search engine that I have more relevant, keyword targeted text and potentially increase my rankings?

OR
Would the search engines not be able to read or evaluate the text? Thus having little to no effect on ranking?

TIA