Cron job

You underestimate Atlassian. It's such a complicated mess.
Well, Jira/Confluence might be perceived as 'messy' in the same way as ROS might be for novices.
These products are complex toolkits capable of doing almost anything but requires solid knowledge and experience to set up effectively. If configured correctly, the environment should be pretty easy for the end-user to use. There are several capable plugins to automate PDF generation, both commercial and free, available at the Atlassian
marketplace. Here are some pointers: "
Confluence PDF Automation"
If you find it too difficult to do on your own, I recommend contacting some consulting experts at
www.atlassian.com/experts.
Have a nice weekend!