No. There's no PDF in-page plugin for any popular browser I know of and therefore no JSF tag to support one; probably in part because of the Eolas patent that resulted in a half-billion-dollar judgement against Microsoft. In part, probably because a PDF and its associated navigation controls take up so much screen real estate that it's simpler just to give the whole window to the reader.
You'll do better to avoid JSF for the part of webapp that displays PDF's and just output them through a regular
servlet.
The secret of how to be miserable is to constantly expect things are going to happen the way that they are "supposed" to happen.
You can have faith, which carries the understanding that you may be disappointed. Then there's being a willfully-blind idiot, which virtually guarantees it.