How to display metadata from file in unified search?

I'm building a EPiServer 8.5 + Find 9.2 site and I wonder how I can get at the metadata embedded in the uploaded files (pdf, doc, docx etc). The site has public search function that uses unified search, and for the MediaData hits I would like to display the title metadata from the file itself in the serp. By default UnifiedSearchHit.Title contains the filename.

I suppose I could implement SearchTitle and extract the metadata myself, but that seems silly since Find/Elastic is already doing that (I can find the file in the index explorer by searching for the metadata title).

I'm hoping there's a simple way to get the metadata!