The latest doping case comes as the International Olympic Committee are considering whether to lift the Russian ban and allow their athletes to march under the Russian flag at Sunday's closing ceremony.
"A doping test by the pilot of the Russian team, Nadezhda Sergeyeva, on February 18 gave a positive result for a heart medicine that is on the banned list", the federation said in a statement on its website, adding that a previous test on February 13 had been negative.
Sergeeva, who finished 12th in the women's bobsled, tested positive for Trimetazidine, a medication used to treat angina.
Sergeeva is not the first Olympic athlete from Russian Federation to have violated the doping rules.
"As we've got two doping cases I don't think they will allow us to be at the closing with the flag", alpine skier Anastasia Silanteva told Reuters.
The ABC reported hours after Krushelnitsky was stripped of his medal, the Russian Olympic Committee said it had paid a $15 million fee as part of criteria to have its team reinstated at the Pyeongchang Games. They have been unable to wear national uniforms or have the Russian anthem played at medal ceremonies.
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Nadezhda Sergeeva (r) and her co-pilot Anastasia Kocherzhova at the 2018 Winter Olympics.
Other Olympic delegations said they did not want to see the Russian tricolor on Sunday.
Curler Alexander Krushelnitsky, who won bronze in the mixed doubles event, agreed to return his medal along with his wife who is his curling partner.
It follows two failed drug tests by Russian athletes at Pyeongchang 2018.
A Slovenian ice hockey player and a Japanese short-track speed skater have also tested positive for doping at the Games.
The 30-year-old bobsledder has denied taking the drug, with the Russian bobsled president announcing, "She confirms she took no such medication and the team confirms she was not issued any medication".