Image background overlaps text when viewing some pdfs on iPad

Problem viewing "Make: Technology on Your Time Volume 39" on iPad. e.g. The round image on page 12 ("What Sticks About...") has a white square background that is blocking some of the text.

I've tried goodreader and ibooks and both have the same problem. However when viewing on a PC using evince, it looks fine. Is there a way to fix this on the iPad?
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