For some reason the iPad safari browser does not handle embedded PDFs well. PDFs view fine on their own when launched standalone, but not with the object tag. The problem is t
The MSD's answer is quite accurate. I have been trying to do it in many different ways, from some of the libs suggested to using object, embed element etc.
In any case it doesn't scroll for me (iPad air 2 and air 1 at least on iOS 8). Or it scrolls with overly stretched letter, or only works on short 1-2 page documents.
The solution which I found the most efficient is providing a link to iPad users via user agent to access the file directly, they will be able to see it in the tab and scroll nicely through it. It does not embed, but it is the most efficient and working solution I could find for my current needs.
I hope it helps somebody delving into the same thing