Submission of PDF files on below listed PDF submission sites helps ranking in search engines. One can have advantage of getting PDF backlinks from high domain & page authority. The process of PDF submission increase domain authority which in return helps ranking keywords as well.
Getting listed on PDF submission sites helps both in generating traffic to website/webpage as well as getting high quality backlinks. Domain Authority is a ranking factor from Moz.com which changes with passage of time. We keep an eye of each webite domain authority and update our list accordingly.
Below is a link to MOZ.COM free tool of search Domain authority.
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