You have multiple options. Either you return the PDF from your current process directly to the browser (assuming it starts with a Nodejs or HTTP Server Input) or embed that PDF directly a web page. In case the process is triggerend differently will need to setup a separate process to serve the PDF.
In the first scenario you will need to set the Mime type of the server input to application/pdf and change step 6 to a Delete step. Visiting the URL of that process (e.g. http://localhost:9090/hello) will show the PDF in the browser window.
When you want to embed the PDF in a web page your could add the following to your web page template:
<embed src="http://localhost:9090/hello" width="500" height="375">
This will call the process that generates the PDF and shows the result in the embed element.
Hope this is of some help,