After taking her picture several times, the ghost will become angry and use faster, fiercer attacks. She will still work roughly like in phase 1 (vanishing after you take her photo, coming from the walls), but this time she's a lot quicker, so you'll have to make sure you leave some distance in between Linda and her to avoid getting hurt.
The ghost's attacks during this phase of the fight consist of several slashing motions in a row using the scissors. She will charge towards you when she starts up this attack combo, but if you move to the side these can be dodged. You might have to leave camera mode to be quick enough for a dodge.
Keeping in mind to dodge the ghost's attacks on time, you should be able to snap a photo of her before her attack (if you're far enough) or directly after dodging it.