Find a solution should search content of attachments

Summary

Confluence has the ability to search and pull up text within attachments.
https://confluence.atlassian.com/display/DOC/Searching+Confluence#SearchingConfluence-Searchthecontentofattachments

When linking Service Desk to Confluence, on the Customer Portal, find a solution should also pull up attachments that match the search term.

Steps to Reproduce:

Create an application Link between Confluence and JIRA
Go to Service Desk -> Settings -> Link To A Knowledge Base
Select a Space
Go to the Customer Portal -> Search for text within an attachment (reproduced with a PDF)

Expected Results:

The search results bring up pages that also show that include the search term in the attachments

Actual Results:

Pages don't show up that have attachments that include the search term