A PDF doc can not be displayed on a webpage
What you can do is:
1. Link to the pdf from a page - someone clisk on it and the pdf opens
2. Capture the document as an image then Display the image on the page
To do this convert the pdf file into an image + resized it to 800pixels wide
There are a number of ways to do this
have a look at
http://www.makeuseof.com/tag/6-ways-to-convert-a-pdf-file-to-a-jpg-image/
You then enter this image into the page like normal