Hi Naveen;
The only way for a DWO to do this, is to use an OLE Type DW that links over to a PDF Viewer.
In the new PB 2019R2 release though, there is a new Web Browser control where you could inject an HTML file that has a reference to the PDF file and then have the Web Control display it that way.
You can also use the IE Active-X control to display web pages as well. So the above technique would work with this alternative control as well.
Externally, you can link over to the default web browser for PDF viewing using the PB based built-in INET object and the HyperLinkToURL() command.
HTH
Regards ... Chris