Advanced eOffer - Route signed offer letter as Task

Summary

We want to be able to route copies of the e-signed offer letter to appropriate groups within the org

Content

We have an e-offer process designed that allows the candidate to sign the offer letter and we can then send notifications to appropriate groups within the organization.  But, we need to be able to include a copy of the offer letter as part of the task notification and have been unable to make this work.  

We can trigger the cover letter/offer letter PDF as a system task, but that  doesn't get it attached to the notification message.  

Has anyone been able to configure something like this?