From where I can get the study material (free pdf) of NCFM Exam?
You can get from NSE India website. Entire syllabus is available in Pdf format for download.
You can refer to belowlink.
https://www.google.co.in/url?sa=t&source=web&rct=j&url=https://www.nseindia.com/content/ncfm/SMBM_rev.pdf&ved=2ahUKEwjz5amTjfHdAhXEQ48KHUiaCCEQFjAAegQIARAB&usg=AOvVaw3E2HcbktsG2JOxIuhjfXPc