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I printed and then scanned the test document using my Canon MX850 (an ink jet printer with scanner, about 6 years old). It's not perfect, but I don't see the issues (blurry text between the yellow boxes, purple stripes) that I see in your Ricoh version. So I'd guess that the problem is the Ricoh drivers. OS X 10.9.5 Printed using Preview 7.0 (826.4) ...
Phil Harvey's exiftool could be wrapped in a AppleScript droplet. As an example of the command: exiftool -S -pdfversion FILE
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