Nope -- well covered in other Community threads.
Also, Qs about product capabilities/support should go in the Products space, not Mktg Central.
There is a backdoor way to use pdf in email:
1. Upload the pdf file to your 'Images and Files" folder in Marketo design center.
2. the pdf will get a url (see picture below). copy it.
3. Create your email with cta button, pointing at the pdf's url. Click on the link will open the pdf file immediately.
It would be better to have option to attach file, but since we don't have this option - this is one way you can do it.
Attachments are abusive to both the sender's systems and to recipients. A 1MB attachment instead of a 1K email uses 1000 times the network I/O, and requires antivirus scanning on the recipient side. In an MA context, attachments will just tick people off. Plus, you can't track who opens them.
If you link the pdf to a URL, you can track the clicks to that URL by setting up a campaign with a 'Clicks Link in Email' trigger. The recipient can also download the pdf from the URL.
Please pay attention to the topic. A PDF attachment cannot be tracked. We're specifically talking about attachments as opposed to URLs.