What to do about a damaged PDF file?

I've beent trying to download a pattern for crocheting a bunny off of a website (a href="http://store.knitting-warehouse.com/projects-rainbowbunny.html)." rel="nofollow"http://store.knitting-warehouse.com/proj…/a It's a PDF file. Every time I click on the link to download the pattern it opens a blank page and then a message pops up that says "The file is damaged and could not be repaired." Is the problem on my end or the websites? Am I ever gonna be able to open the file? Any help or ideas would be greatly appreciated.