I saw a bunch of strings on how to get a pdf to show up on the wordpress page in the form of an image. The questions seemed unanswered. I struggled with this myself and figured it out. What you do is convert the pdf to a jpg and insert it as an image.
1) download pdf to computer.
2) go to http://www.zamzar.com/
3) upload the pdf to the website
4) chose jpg format
5) enter email and wait for response
6) download attatchment from email
7) go to upload insert image on wordpress page
8) download new jpg to wordpress
9) pick size of image, title image, etc.
10) upload it
Hope this helps.