This simple with google embed
document.
1) create your link to that page as usual' 2) on the destination page add this iframe
<iframe src="http://docs.google.com/viewer?url=http://yoursite.com/folderWhereYouHideYourPdfFile/yourPdfFile.pdf&embedded=true" width="100%" height="100%" frameborder="0">
this will embed the document. you can then style it up. if you want, can be to popup or load with ajax.
=============================Another Method Could be to use Php============== So Instead of iframe on destination page you can have something like this
<?php
$filePdf = 'yourPdfFile.pdf';
$fileTitle = 'Become A Solider';
header('Content-type: application/pdf');
header('Content-Disposition: inline; filename="' . $fileTitle . '"');
header('Content-Transfer-Encoding: binary');
header('Content-Length: ' . filesize($filePdf));
header('Accept-Ranges: bytes');
@readfile($filePdf);
?>