Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d7506980f4b9da…

MALICIOUS

PDF

43.3 KB Created: 2020-08-05 04:39:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6606d5174d0c24b1aebf9396ee9f6a9 SHA-1: 6cf232b621527700a30bc44e3ad326758f50e774 SHA-256: 94d7506980f4b9daa550da487bb227da34d4790a7cac9fc142edc29fd0a02c97
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=bancassurance+pdf+download'. Additionally, it features a PDF link farm heuristic, indicating a large number of external PDF links, with the primary one being 'https://cdn.shopify.com/s/files/1/0429/8909/3018/files/56580958708.pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body text, though heavily obfuscated, contains the lure 'Bancassurance pdf download' and the malicious URL, suggesting a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.com/pify?keyword=bancassurance+pdf+download
    • http://xitowired.topstonecanada.com/uploads/1/3/1/6/131637254/d4b55278c0e.pdf
    • http://files.thepottersstudioca.com/uploads/1/3/0/7/130775182/votife.pdf
    • http://files.kathleenmercury.com/uploads/1/3/1/4/131406036/tijurut.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/56580958708.pdf
    • https://cdn.shopify.com/s/files/1/0434/0976/8600/files/bisopoxavidim.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/monumegasuwipijuzu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/21471096668.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48975286879.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/vivigotalekuni.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/povulenepezeruwuxorenovog.pdf
    • https://cdn.shopify.com/s/files/1/0431/4634/6657/files/jegirifabadimizezipu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7228/2008/files/86218585264.pdf
    • https://cdn.shopify.com/s/files/1/0437/2358/7736/files/1._14._4_fabric_mods.pdf
    • https://cdn.shopify.com/s/files/1/0433/7618/1398/files/creative_zen_mp3_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/6878/3766/files/82668443944.pdf
    • https://cdn.shopify.com/s/files/1/0432/2181/1362/files/sintomas_de_insuficiencia_cardiaca_izquierda.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.

FilenameKindSourceSize
font_00_sfnt_off00005f72.bin
cbb125e3e14134f3c3e3d109b2553f8257fc6432e8dbe94404d15da56225d683		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F72 5044 bytes
font_01_sfnt_off000070af.bin
79bcaa959b2049d2c06fec8db8c1a20b15f3f921ad5c6ac2c27b2c2d14d3aafd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70AF 9828 bytes
font_02_sfnt_off0000924b.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x924B 4324 bytes

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