Malicious PDF — malware analysis report

Static analysis result for SHA-256 4432308817ddf59f…

MALICIOUS

PDF

33.7 KB Created: 2020-09-04 00:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9aa4c5e5ce3c613c350dd0d1fed362d1 SHA-1: 58e45996e5b35efb7ae4c6f5ce088f7d9b3c7804 SHA-256: 4432308817ddf59f2daa1fe2ec811963b5f9efc9efb83353972d5eec69d6b3d4
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a prominent link that redirects to a malicious domain, disguised as a search result for a product manual. This link is identified as a malicious redirector. The document also contains a large number of embedded links, many pointing to Shopify, which is characteristic of SEO link farm abuse. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/wix?keyword=bosch+classixx+fridge+manual+pdf
    • https://cdn.shopify.com/s/files/1/0431/1053/1238/files/wabedapuxinezusad.pdf
    • https://cdn.shopify.com/s/files/1/0432/5048/3368/files/87079813031.pdf
    • https://cdn.shopify.com/s/files/1/0428/8066/3705/files/vufaxupen.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/waiting_for_the_barbarians_full.pdf
    • https://cdn.shopify.com/s/files/1/0438/3594/9218/files/xajexun.pdf
    • https://cdn.shopify.com/s/files/1/0437/9649/6544/files/el_neoliberalismo_equipo_maiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/9616/9886/files/sidosugevevapumuloxa.pdf
    • https://cdn.shopify.com/s/files/1/0467/5970/6787/files/lowejopa.pdf
    • https://cdn.shopify.com/s/files/1/0435/7246/1727/files/99774748896.pdf
    • https://static.usrfiles.com/ugd/1cc777_9bc3943bbedd4ac49b43046e21265868.pdf
    • https://static.usrfiles.com/ugd/3eed2b_aa6754c2d728445089179858ee5a36b3.pdf
    • https://static.usrfiles.com/ugd/6cf804_02d36cad44e34a7a98292d7cee80c3d6.pdf
    • https://static.usrfiles.com/ugd/b7082a_aa4ad01c62d3481387377c3c56ebded7.pdf
    • https://static.usrfiles.com/ugd/b8c837_4655a326cd484d3082b8df47b7d8b63f.pdf
    • https://static.usrfiles.com/ugd/0df15e_b52d0a65db0c4d7b81b96415a76c4f5e.pdf
    • https://static.usrfiles.com/ugd/735189_00d235376ffc4c1a82d0a86554d16482.pdf
    • https://static.usrfiles.com/ugd/3aee12_ffe6d788eec44edcbd5e1cda6ae2bbae.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046e2.bin
d5425686610be748733cf6c54f24907a294d1bb3c10eb80a4c26584cc17db9e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46E2 5688 bytes
font_01_sfnt_off00005a1b.bin
3583fc68fb17f60b99d61fe9dabc9c7b3c8d7ba60363ec6b8049d98cc8cf4759		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A1B 9316 bytes

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