The syllabus depends on the examination you are giving. SSC Conducts multiple examination such as CGL, CHSL, MTS, GD constable, JE etc. So each examination have different syllabus. There are no such rigorous syllabus but you can get the things you need to know in order to qualify the examination.

For the syllabus of different ssc examinations you may visit the link provided below:

https://ssc.nic.in/Portal/Syllabus

I hope this answer helps. All the very best for your future endeavors!