The common phrase used by scammers is "Your acts tell more than your words".Those are DEFINITE red flags, and if your situation develops like this, forget about this "woman".Here are the typical situations that may develop with slight variations.
There is something miserable about her situation that makes you feel sorry for her (her father left them when she was a baby and her mother struggled to bring her up; her mother/child is very sick; she had to move to a strange city where she does not have friends, her parents are dead, etc).
As I said, those signs do not indicate with confidence that you are entering a scam, and not all of them will appear in a scam.
A scam is the consequences of acts undertaken by a dishonest person whose sole aim is to steal your money.
So all means and different tactics that scammers use will eventually lead to a situation where you are to give some amount of money to the dubious person.
Disinterest in your money matters does not mean anything, as well as interest in it is not a bad sign.
An attractive young woman may be interested in you because you are successful and have a strong personality, and it does not necessary mean a scammer. So it is virtually impossible to detect a scam in the very beginning.They are corresponding with a criminal whose sole aim is to rip them off.All is false - pictures, letters, words and feelings.The "woman" falls in love with you very quickly, within 3-5 letters; A new picture (more and more provocative) is sent with every letter; She talks a lot about issues of honesty and trust; She does not answer your questions, or answers are not included in the main text of the letter - seems as though somebody just added them to a letter that was prewritten (you might think it's because of the language barrier).Letters arrive regularly; often the same time of the day, every day or 5 days a week; She wants to meet you as soon as possible to "prove" her love to you, and the best option is her visiting you; she has a way of getting a visa to your country without any problem, and it covers even USA and Canada where to get a visa for a single Russian female is virtually impossible (usually with the help of relatives or University); She draws attractive pictures of what you two can do when you meet... If you hesitate or try to do things in your way, she becomes very upset/angry, and claims that if you don't trust her it's better not to meet/correspond at all and end the relationship.The possible reasons for the money transfer can vary, from payment for email or buying ticket to visit You, to renting apartments for your future visit or paying for urgent operation for "her child".