Hello Nathan Amram, thanks for your question ! By default, Dust doesn't integrate pdfs in the Gdrive connections. (as for many customers, it lead to adding too much "noise" to Dust and reducing the accuracy). Can you send an email to support@dust.tt to ask to integrate pdfs on your workspace?
You will then be able to connect to to your assistants through the "search" tool. Let me know if you face any issues !