If you would like to do that, just use my notebook here.

This notebook was a little helper for me, when I received a family tree from my cousin. I could not convince her to give me the raw images, so I extracted the from the tree PDF. All you need to do is opening a PDF file with the button below. The extraction will start immediately. Output is a zip file with all images in JPEG format.

It all happens on client side, so you need no app for this easy task.