Yes, this is absolutely possible.
You need a small piece of software called CutePDF. Its free and hardly takes any space on your pc/laptop.
Direct Download Link for CutePDF
Once downloaded, install the software and follow the steps below:
1. Open your project primavera file
2. try to print it
3. before printing, the time when u have to select your printer, select Cute PDF Writer as shown in the image below
4. Click on print
5. The primavera project will be printed as a PDF file and you'll be asked where you want to save it :)
6. Choose your destination.
7. When the printing is completed, you can open the pdf file in Adobe PDF reader
* You don't need a printer to do this
* You can follow the same steps and print word/excel/powerpoint files to pdf (or any other file type that you can "print")
Hope this helped!