According to the benchmark database, the specs of this upcoming 4.7-inch handset include a 1.5 GHz octa-core Qualcomm chip, 2 GB RAM, and 8 GB internal storage space.
http://www.notebookcheck.net/Samsung-Galaxy-A3-2017-hits-GFXBench.173942.0.html
Where did you get Qualcomm from? Considering it has a Mali GPU it's most likely an Exynos CPU, probably the same as A5: 7880.