While you cannot specifically get the 2017 version for free from official sources, you can download a 7-day free trial of the most current version. : Visit the After Effects Free Trial page on Adobe's website. Requirement
Who should consider a newer version instead adobe after effects cc 2017 free
The request for a "free" version of Adobe After Effects CC 2017 touches on a complex intersection of creative desire, economic barriers, and the ethical-legal framework of the digital age. While the 2017 release was a pivotal moment for motion graphics, accessing it today for free involves significant risks and ethical considerations. The Historical Significance of CC 2017 While you cannot specifically get the 2017 version
: A completely free, open-source 3D creation suite that includes powerful compositing and motion tracking capabilities. adobe after effects cc 2017 free