I suggest changing the link from the .pdf to the web page: https://papers.nips.cc/paper/7181-attention-is-all-you-need

It's one click to get the pdf from there. But you also get a plain webpage with abstract, citation details, and so on, which you can't get back to from the PDF.

In general it's good to knock the ".pdf" off the end of all papers.nips.cc links. Similarly turn /pdf/ links on arXiv into /abs/ links, and replace "pdf?" in openreview.net links with "forum?".