Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9f5a11e160f2200…

MALICIOUS

PDF

40.0 KB Created: 2020-08-08 08:48:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99a01fcd9ba9d83f87ed79bf4b99b499 SHA-1: 0604521b94d0087528ce45fd975f486a789feeca SHA-256: d9f5a11e160f22000149f93f949b493ee1073ab8be97bf5e69b0b2e0e4420c03
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for PDF_SEO_LINK_FARM. One of the embedded links, https://ttraff.ru/pify?keyword=assistant+production+manager+job+description+pdf, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to job descriptions and the malicious URL, suggesting a phishing or scam attempt to redirect users to malicious infrastructure.

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=assistant+production+manager+job+description+pdf
    • http://files.artoonsforyou.com/uploads/1/3/2/6/132695919/2098178.pdf
    • http://files.keetoncorrections.com/uploads/1/3/1/8/131856331/05aa903bd.pdf
    • http://files.kingwoodmusikgarten.com/uploads/1/3/1/3/131384401/9337632.pdf
    • https://cdn.shopify.com/s/files/1/0431/8206/3777/files/rokafevefogefevexezizugo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/99370408067.pdf
    • https://cdn.shopify.com/s/files/1/0430/0449/3987/files/26704851400.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2089/files/14257199763.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/akhirat_tidak_kekal.pdf
    • https://cdn.shopify.com/s/files/1/0430/4814/0949/files/acidose_lactique_metformine.pdf
    • https://cdn.shopify.com/s/files/1/0430/4338/9597/files/zizuvuxalutusimebigoxapol.pdf
    • https://cdn.shopify.com/s/files/1/0429/2686/6599/files/53840244745.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/25496473478.pdf
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/tobudekimilibedorukew.pdf
    • https://cdn.shopify.com/s/files/1/0431/8406/2622/files/52639912466.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/90776857966.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_off00005e17.bin
3bb42950602600afc061d4714de82bb6425ff31d195860a80fe6ca9d6a3f09a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E17 5648 bytes
font_01_sfnt_off0000713b.bin
884a5b8651259b4cee6568e7d6bb4dfec8a9dd9f8e82625b902ab09313cf8101		 pdf-font-stream PDF embedded font (sfnt) at offset 0x713B 9928 bytes

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