Render to PDF

Is it possible to render a SSRS report directly from a report server to a physical PDF file without user intervention?  We are currenly using the SSRS url to render a report and it comes up in a web page in print preview mode.  An example url is below:

http://rptserver/ReportServer?/OfficeReports/PurchaseOrder&rid=12345&rc:Parameters=false

Thanks.