One of the accused has been arrested, while police are searching for the second suspect.
The incident took place on Monday night when two men allegedly entered the woman's house, took her to the terrace and threw her off the roof.
The woman sustained critical injuries.
She was initially taken to a local healthcare centre before shifting to a city hospital.
Her family alleged that the attack was part of a continued attempt to force her to withdraw the gang-rape case filed in June.
Family alleges pressure to withdraw rape case
The woman's family claimed they had been threatened and pressured to reach a "compromise" following the gang-rape complaint.
They further alleged that despite filing a complaint with the police, no action was taken.
Following Monday's attack, a fresh First Information Report (FIR) was registered.
One of the accused, identified as Bhongal Kumar alias Bhongal Mahato, has been arrested.
The second accused remains absconding.
Details of alleged gang rape in June
The latest attack comes five months after the woman was allegedly gang-raped by five men in June.
According to the complaint, the woman stepped out of her house at around 11:30 pm to relieve herself when she was allegedly assaulted.
The accused reportedly locked her husband inside a room before taking her to an isolated location, where they allegedly gang-raped her.
She was later found abandoned near her house.
The medical examination revealed the brutality of the alleged assault.
Doctors recovered what police described as a "cartridge-like object", along with a stone and a piece of wood, from her private parts.
Police had arrested four of the five accused, while the fifth remained on the run.
Family alleges another attempted assault
The woman's family further alleged that the Monday attack was the latest in a series of attempts to intimidate her into withdrawing the case.
They claimed that three months after the alleged gang rape, some people had entered their house and attempted to assault her again.