New analysis has come out from the CBO which says pretty much exactly what OP was saying. In terms of federal revenue, the government is gaining revenue from the poor (largely due to a projected decrease in insured population until 2027 when the individual tax cuts end and then the poor are just getting screwed) and losing money from the rich population.
Note: Positive numbers are increase in federal revenue meaning more money coming from these groups, negative numbers are decrease in federal revenue meaning less money coming from these groups.
Further, when the individual tax cuts expire in 2027, every group making under $75,000 will be paying more in taxes while every group making over $75,000 will be paying less in taxes.
This is the clearest things have been made demonstrating that this tax proposal is "stealing from the poor to give to the rich".