Are you retarded? Or are you so lazy you don't check your post, and seeing that they don't contain any links? Because I sincerely hope you tried to link to something in that gibberish post.
You can link to your PDF file as you would any other file: <a href="file.pdf">pdf file</a> It helps to add pdf.If you have a lot of PDF files, it's best to keep them in a separate directory from your HTML files. Adding these PDFs to a folder with a name like "documents" is a pretty common practice.
I'm not a developer, i always use this free online attach pdf to html from pdfcoding.com http://www.pdfcoding.com/online/pdf/convert-pdf-to-html-files/.
You can also use Google PDF viewer for this purpose,You need to upload your PDF somewhere before. As far as I know it's not an official Google feature but it works for me very nicely and smoothly. or use <a href="filename.pdf"></a> May be it will work.
It's funny how more than 10 people give exactly the same answer. Just do <a href=".pdf"></a>, than the next answer just do <a href=".pdf"></a>, than the next answer is the same, same and same.