The use of a PDF for an infographic was a very poor choice. The design of it was very unusable for a browser, since its really wide and detailed.

This page is much more interesting and should of been the homepage: https://www.google.com/landing/takeaction/sopa-pipa/

They didn't link to a PDF originally, but the viewer they linked to was configured incorrectly. Rather than continue showing an error message, they replaced it with a direct link to the PDF. Hopefully they'll change it to something else at some point this morning.