"Death by Glamour - Undertale" is a high quality rip of "Death by Glamour" from Undertale.
The advertised track is mashed up with the instrumental version of "Lucky Strike" by Maroon 5.
This rip is associated with another rip, "Death by Glamour (Unused Vocal Version) - Undertale", which uses the full version of "Lucky Strike" with the vocals included. These rips were both uploaded at 9:30 a.m. UTC.
Both of these rips are notable for having the songs playing in their original keys ("Death by Glamour" is played in the key of E minor and "Lucky Strike" is played in the key of D minor), so they end up sounding a bit off. This would later be fixed in the rip "Death By Glamour (Complete Mix) - Undertale", where "Lucky Strike" is edited to play in the key of E minor.
This is the first rip that features Maroon 5.