Amazon targeted ads – reading through word doc…

I had a word document (on a mobile, samsung s8) sent to me that had an amazon link in it. The link was never clicked, and yet when I loaded up amazon some hours later, that advert showed up straight away. This is an item I would never buy myself, and would not be related to any search history or related items. This must mean that the data on my word document had been read by amazon to create a targeted ad. How far reaching does this breach of privacy extend?

Found here /// Privacy Galaxy!