Since it was said, 1 bit is flipped, just tried brute forcing bit flip and dumped all the images, then ran tesseract to extract the text, then grep'd for SECCON and got the flag.
```
with open("broken.jpg") as f:
a = f.read()

def flip(er, n):
return chr(ord(er) ^ (1<<n))

for i in xrange(1000):
for j in xrange(8):
b = a[:i] + flip(a[i], j) + a[i+1:]
with open("temp/" + str(i*10+j)+'.jpg', 'wb') as f:
f.write(b)
```

`for i in *; do tesseract $i stdout 2>/dev/null; done | grep SECCON`