Brand New Vinyl Static and Pops

The static is minor compared to the flubbing noise which is sever.  Not playable.

What is a flubbing noise? Rumble?

What is yout TT and Phono Section. 

Is there a subsonic filter on your Phono pre/section?

yes sort of a rumbling sound with the sound muffled. muffled is a better description.

I have a Technics 1500C TT connected to an old Denon receiver.

Nothing has changed.  Not sure what is happening. Odd.

I hope you did not forget to connect the ground wire from Tt to the receiver? If you did not connect it, You will get all those problem you describe.