After two weeks of interviewing for a position, I made it to the final interview with another candidate. A day after, the recruiting company sent me an attachment containing a general summary of the company's benefits. The recruiting agency said that the company I interviewed with requested that they send it to me. Is that a good sign that I will get a job offer? I can't see the point of getting that information if they selected the other candidate.
It is definitely a sign that they wanted you to have that information.
Why they wanted this is probably open to debate, I would say they are considering you as a candidate or it could be part of the onboarding. Or it could be something standard they were supposed to send out at the beginning but forgot.
Without a crystal ball it is hard to say.
Is that a good sign that I will get a job offer?
Don't make that assumption. The other candidate probably got the same information, and it's far more likely that HR is sending that information to any candidate making it to the final rounds. The cost of doing so is small, it'll take an HR agents a few minutes to send this out, but it makes the company look sympathetic, and giving you this information early may speed up the process.
The only question I would have is, why give this information so late in the process? Unless the company benefits are really lousy, you'd like to use them to lure candidates.
It means that you're still at the table, or that they were suppose to send you this before your final interview but they failed to follow up...
Either way, it is really not going to be that long till you know whether you got the job or not. For now, relax but continue to apply to other positions you are interested in. There is nothing certain until you get a written offer for the position.