Just putting my thoughts for your "Download" on-click Adobe Analytics tracking:
So, two tracking requests fire
1. Download Link (not an "exit" link request): This appears to be case of automatic download link tracking - https://marketing.adobe.com/resources/help/en_US/sc/implement/link_automatic.html. You'll need to check the "s_code" JS file & DTM Adobe Analytics tool settings for "Link Tracking" section to identify its origin & remove this tracking request.
2. Custom Link: For this you have created rule "Link Tracking - PDF links - 1216" but most likely you have not set "event3". Only linkName & eVar3 appears to be set within the rule. Please add event3 to events within the DTM rule.
Hope this helps.
Regards,
Saurabh Kumar.