I figured it out because of how big my brains are.
I ran a preflight custom check.
1) Create a new Custom preflight profile Advanced|Preflight|Options|Create New Preflight Profile
2) Give the profile a name (Fontfinder, say)
3) In the left window of the dialog click "Custom checks"
4) In the right window of the dialog below the blank box click the plus symbol to create a new check and include in current profile
5) Click "Font" in the Group, find the property "Font type is Type 3". Select this and click "Add"
6) The pane below now has more options. Click on the drop down options and select "is true"
7) Click OK and then OK in the Edit Profile Dialog
😎 Run the profile on your PDF
The following report will show you what page the font is located on.

(thunk) sorry my head just fell to the desk on account of my big brains. 😉