Scroll and zoom PDFs in Mobile Safari on the iPhone

macosxhints.com iPhone tips

If you have a PDF document embedded in a web page, the iPhone won’t let you look through it with one finger scrolling. However, if you start using two-finger scrolling on the document, you can scroll around it like any other web page. The pinch/expand gesture also works to zoom in or out on the PDF.

The iPhone will load it pretty slowly, but it’ll get there eventually.