Based on some of the comments i believe what you want is to track PDF views and interactions. As you have already learned, adobe analytics (or any other analytics tool) only work on channels (Web Pages/Mobile Apps etc.) where you can embed Tag Management script. (Adobe Tags or other TMS you use).
The only OOTB offering i can think of is the PDF viewer core component. https://experienceleague.adobe.com/en/docs/experience-manager-core-components/using/wcm-components/pdf-viewer
What it requires is that you don't expose the PDF URLs but a page URL which hosts (embeds) the PDF. this way you can do much more than just page views tracking. (what page people scrolled to, what did they search within the PDF etc.)
If PDF viewer is not an option, there is a complex customization you'll have to do which would be too much to describe here as it has dependencies, assumptions, limitations which can't be clarified without a discovery engagement.
As i always say, if you can describe your 'functional' use-case requirements , you'll get much better 'technical' solutions.
HTH.