Please see the HTML5 Report Viewer toolbar
help article to see what functionalities are provided in order to interact with reports.
The Report Viewer does not have a functionality to load pdf files. It can display Telerik Reporting reports only and export these reports to PDF format if needed.
Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Feedback Portal
and vote to affect the priority of the items