Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa4bed93ce6300e8…

MALICIOUS

PDF

43.0 KB Created: 2020-08-16 22:25:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c22549f51100a49508e1e6f72b2efaf4 SHA-1: c91b80a7c25b70741640c085318b44b530fcb6eb SHA-256: aa4bed93ce6300e8b23359bc0f3b614240f9870d14b468557e247162ac5757ac
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to a URL with a 'pilot test guide' keyword, suggesting a lure for users interested in aviation. The PDF also hosts a large number of external links, many pointing to Shopify, likely as part of a link farm to improve SEO for malicious content. The primary malicious URL is ttraff.ru, which is flagged as a known malicious redirector.

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.ru/pify?keyword=canadian+commercial+pilot+flight+test+guide
    • http://files.dmlimos.com/uploads/1/3/2/3/132302963/kokovabatab.pdf
    • http://files.workinnvision.com/uploads/1/3/1/3/131384018/zudemesenodevakani.pdf
    • http://vakuza.piecesoftimesouth.com/uploads/1/3/1/0/131071157/01e5eed2e.pdf
    • https://cdn.shopify.com/s/files/1/0438/0337/7824/files/60789936152.pdf
    • https://cdn.shopify.com/s/files/1/0448/6837/0594/files/beclometasona_spray_bula.pdf
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/nerevuvovovupivedat.pdf
    • https://cdn.shopify.com/s/files/1/0433/0605/7888/files/47138661734.pdf
    • https://cdn.shopify.com/s/files/1/0430/9336/0791/files/sasadugawexanabomofaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/61124929838.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5082/files/44081610952.pdf
    • https://cdn.shopify.com/s/files/1/0430/7025/9357/files/56777878159.pdf
    • https://cdn.shopify.com/s/files/1/0432/5185/9611/files/carpal_tunnel_physical_therapy_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/1667/4713/files/vazisenuwi.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_off0000688c.bin
8ff2ff85650b3ca7e757dae30de8dc4d6007ccaa922a01ff005470259b919662		 pdf-font-stream PDF embedded font (sfnt) at offset 0x688C 5476 bytes
font_01_sfnt_off00007afd.bin
b7362fe1fac896929137cc629d7aba8b6b8cf34756a2921f80ebac43252eb6d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFD 10628 bytes

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