Why do images within a PDF look jagged when viewed in Acrobat Pro 10.1.6?

Using a MacBook Pro running Mac OS version 10.7.5 with NVIDIA GeForce GT 650M 1024 MB graphics card. High-resolution source images look fine in other software, and embedded images in a PDF look fine when viewed on Google Drive, but curves and diagonal lines look jagged when viewed in Acrobat Pro 10.1.6. Checking smoothing options in Preferences only adjusts the position of the jagged edges; it neither enhances nor ameliorates them.
I created a sample PDF to illustrate the problem I'm having. Created in illustrator, exported to PNG and converted to PDF. Here is a screenshot of the source PNG side-by-side with the PDF I created from it:
Please note that when I preview the PDF in Finder, and when I view the PDF in Chrome using Google Drive, the image looks fine. Here's a link to the sample PDF:
http://www.sendspace.com/file/77f5m6
Any assistance is appreciated. Thanks!

Unfortunately, as I mentioned in my original post, I've already tried toggling smoothing options. They don't make the jagged edges go away—they just change them slightly. In some cases, as with the sample file provided, it does help smooth the art out, but it never looks as good as it did going in, in a recent project, toggling smoothing options didn't affect the appearance of the image at all. Zoom does not appear to relieve the artifacting.
A little clarification: this PDF was created from a flat PNG, but I have had this issue with PNGs and TIFFs as well, generated by both Photoshop and Illustrator. To reiterate, the PDFs display fine in other software—Finder preview looks great, and the same file viewed in my browser via Google Drive looks as intended as well. A colleague was able to replicate this issue in Acrobat on his Windows machine. This appears to be a rendering issue specific to Acrobat with regards to the files I use it to create.

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