The first 0x630 bytes of the .text section is the IAT (import address table) which IDA has converted to a new section .idata
:
1000 [ 630] RVA [size] of Import Address Table Directory
Name Start End
---- ----- ---
HEADER 01000000 01001000
.idata 01001000 01001630 <- added by IDA
.text 01001630 01054000
.idata 01054000 01054004 <- added by IDA
.data 01054004 01059000
If you uncheck [x] Make imports segment
in the initial load dialog, you'll get the unmodified section table:
Name Start End
---- ----- ---
HEADER 01000000 01001000
.text 01001000 01054000
.data 01054000 01059000