Jim, the file you linked to is a perfect PDF file. The only thing odd about is is that it's a scan of a blank page. I looked through the file, and there is nothing wrong with it, and it does display correctly in Adobe Acrobat DC. But, as I said, it's a scan of a blank page, so you have to look very hard to find evidence of any information on that page: There is a dark area at the top, which is very likely due to a slightly misaligned scan:

As you can see, I zoomed in to 3200% to make this more obvious.
You can also see small dots in the white area (much harder to capture in a screenshot) - this is from the bottom of the page:

I even extracted the image that is in the PDF file and opened it in Photoshop with the same results. The image that you see in Acrobat or Reader is identical to the image that is stored in the file.