The page is made up of one gradient in the background, text and a couple of vector files.
I can tell that the text is there, as I can hightlight the areas where the text should be (in editing tools)!
It could be an issue with the iOS Reader or the pdf file. What version of Reader for the iOS are you using? Can you look at the pdf on a Windows or Mac machine and look at the document properties and see what application created the pdf? Can you post a link for us to look at the pdf file?