Step #1:

Download Samsung USB Driver and Chainfire Rootfile for Galaxy S5 SM-G900F on your computer.

Step #2:

Extract the Chainfire Rootfile for Galaxy S5 SM-G900F on your computer. Install the USB driver.

Step #3:

Power Off your Galaxy S5 SM-G900F.

Step #4:

Now, Boot into Download Mode by Pressing Volume Down + Home Key + Power Key.

Step #5:

In Download Mode, You will see warning screen. Now Press Volume Up Key to continue.

Step #6:

Open Odin3 (found in the chainfire rootfile), and connect your Galaxy S5 SM-G900F to the computer.

Step #7:

Now, In Odin Click on the AP Button and select CF-Auto-Root-klte-kltexx-smg900f.tar.md5 file.

Step #8:

Now, Click on the Start Button to begin the root process. Leave your phone plugged in.

Step #9:

Once rooting procedure is completed you will be on the home screen. Find the "SuperSU" app to confirm root.