Google Index

Where are you posting them?
 
blogger comments, forums, youtube comments ...
 
Build cheap tier 2 links to them, build blog comments to them, use 301 url shorteners and then index those with an online indexer
 
Build cheap tier 2 links to them, build blog comments to them, use 301 url shorteners and then index those with an online indexer
Build a little more of these and the PDFs (if hosted on your site) may get de indexed before even appearing on the serps. Lol
 
Build a little more of these and the PDFs (if hosted on your site) may get de indexed before even appearing on the serps. Lol

I'm assuming the pdfs are on a parasite or something. Would not recommend that for money site
 
some sites is easer than others, you need to test by yourself
 
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