Link to PDF produces improper display

In a post on our site (RATC.org) an article includes a link to a PDF that has been uploaded to the Media directory. When the link is clicked the PDF will not display correctly. It seems to be mixing the PDF’s content with the JPG content in a link at the bottom of the article. I assume the problem is a WP one because when one right-clicks the link, copies it, and pastes it into a new browser tab it works as expected.

Here is a link to the post in question:
https://www.ratc.org/atc-mountain-valley-pipeline-an-unprecedented-threat-to-all-national-trails/

The embedded anchor link looks to be correct, with the file name following the ‘href’ attribute name which is followed by the standard ‘target=”_blank” rel=”noopener noreferrer”>’.

Any help would be appreciated,

Jonathan