I installed Ceative Cloud to have Photoshop, Premiere, Acrobat, Audition, Illustrator and After Effects installed. For some reason, Adobe thinks thank I need 14 new processes loaded 24/7, note that we have more Adobe processes than any other
app on startup. I also does not considered more 6 processes loaded as service or task manager under svchosts.exe.
"acrotray.exe" is the Adobe Acrobat Distiller helper application. It is used as part of the full Adobe Acrobat product to convert documents into PDF files. Its runs in background as it provides your feature to convert files to files to PDF using other applications like MS office. However you can follow the steps mentioned by Rahul to stop it.