hltvbattle . com
Be very careful with websites like this, DO NOT LOG IN TO THIS WEBSITE WITH YOUR STEAM ACCOUNT. A lot of people have had their steam accounts hijacked and it may look very convincing to some, it even has a fake window popup that looks like this:
If someone on your friend list has been sending such links, let them know as soon as possible and remember to always log into trusted websites with your Steam account, if you do not know what the website is all about DO NOT log in with your account and ensure that it is actually legit.