PDF malware analysis — malicious · 8b5b4aa4993c59f7

MALICIOUS

PDF

36.6 KB Created: 2020-09-10 08:57:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 7ea91e86b22da4ea8b62f5435f53acec SHA-1: 31c8f5088513c7c4a9a5ed43fb98ca3fa901f668 SHA-256: 8b5b4aa4993c59f7f43365184d15a0fb23aabc10246c929e5885daceb3b23c0b

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious due to the presence of a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious content. One of the embedded URLs, 'https://ttraff.link/pify?keyword=prepositions+conjunctions+and+interjections+worksheets', is flagged as a known malicious redirector. The document body contains garbled text but also includes the same malicious URL and a list of other PDF links, reinforcing the link farm heuristic.

Heuristics 3

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://ttraff.link/pify?keyword=prepositions+conjunctions+and+interjections+worksheets
- https://static.usrfiles.com/ugd/bc0b97_de06fc2df50c482cbdc303fa6d88d1ef.pdf
- https://static.usrfiles.com/ugd/4733ca_edde7f4eb75d45f1ba86d274f4d47b38.pdf
- https://static.usrfiles.com/ugd/5d2cf3_e80dbc5aec184178b4958e7d17e7c200.pdf
- https://static.usrfiles.com/ugd/defdb4_078537a4df5445719b6915b0e1bdfcff.pdf
- https://static.usrfiles.com/ugd/f65175_76e7377a5d4947fca89870a0497f7da1.pdf
- https://static.usrfiles.com/ugd/df7b34_a64ce21757524d4d8724e9fbde297bf7.pdf
- https://static.usrfiles.com/ugd/2e16aa_d2ee8a1bbffc4eae97bceeec919edc12.pdf
- https://static.usrfiles.com/ugd/f64db8_ce77573c3a964f0d825bdae0b3aa8886.pdf
- https://static.usrfiles.com/ugd/941881_9dff1764a6964579bbcebc3c296bad18.pdf
- https://cdn.shopify.com/s/files/1/0435/0764/6630/files/99452447313.pdf
- https://cdn.shopify.com/s/files/1/0427/6341/9815/files/56210153362.pdf
- https://cdn.shopify.com/s/files/1/0436/4327/3369/files/bubileretizudizabalomugi.pdf
- https://cdn.shopify.com/s/files/1/0463/3460/7522/files/71970895339.pdf
- https://cdn.shopify.com/s/files/1/0431/2537/5130/files/48316200320.pdf
- https://cdn.shopify.com/s/files/1/0433/1523/2921/files/xevepulisitatigekiraba.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000044a7.bin` `e0d2338920484a38a7788fa3f1c68f9416b6cbdff1d8b79653e71b3f52e98f8e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x44A7	5244 bytes
`font_01_sfnt_off0000567d.bin` `463357d89dc79886cdf3dfe6528434a26bb36cd008321cca9e61f88e446a089e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x567D	9612 bytes
`font_02_sfnt_off0000772d.bin` `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x772D	4324 bytes

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