Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d51e0edde3e396…

MALICIOUS

PDF

46.9 KB Created: 2020-08-20 12:41:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0357b8c7d03c54ffb5035b771a9f22b SHA-1: e9fe58132e8ec9681873942ff916b2c04bdb9bfa SHA-256: 34d51e0edde3e396dddf8ac3e312fabd3b566879d945bc93f54fd32efa566fc9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector infrastructure, ttraff.com, which is designed to lead users to malicious content. The document also includes a large number of links to other PDFs hosted on Shopify, suggesting a link farm or SEO poisoning tactic to increase visibility. The ML classifier strongly indicated maliciousness, supporting the conclusion that this is a malicious redirector lure.

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=ballard+score+pdf
    • http://nadawu.menardcountycemeterymd.com/uploads/1/3/1/4/131406717/54ca9b.pdf
    • http://jixosak.kansascitywriters.com/uploads/1/3/0/7/130738706/8241048.pdf
    • http://files.storywings.net/uploads/1/3/0/7/130776567/melusabodekuzu_dobajo_pumizunibo_wunobalal.pdf
    • https://cdn.shopify.co
    • https://cdn.shopify.com/s/files/1/0435/7927/7467/files/bosch_c7_battery_charger.pdf
    • https://cdn.shopify.com/s/files/1/0432/2410/5124/files/21838740756.pdf
    • https://cdn.shopify.com/s/files/1/0437/3449/9493/files/normas_internacionales_de_auditoria_interna_libro_rojo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1072/7841/files/95564046918.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4447/files/46685675523.pdf
    • https://cdn.shopify.com/s/files/1/0431/0509/1745/files/38057951518.pdf
    • https://cdn.shopify.com/s/files/1/0435/1796/8543/files/www._hauppauge_wintv8.pdf
    • https://cdn.shopify.com/s/files/1/0433/5514/4347/files/magistrates_sentencing_guidelines_drink_driving.pdf
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/bizevaminopomig.pdf
    • https://cdn.shopify.com/s/files/1/0434/5852/7397/files/40858173887.pdf
    • https://cdn.shopify.com/s/files/1/0434/5489/0149/files/cfmoto_650_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/6786/6265/files/34741869269.pdf
    • https://cdn.shopify.com/s/files/1/0428/7902/5318/files/classical_sociological_theory_second_edition.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_off00006db3.bin
a3951ecf213019c5f5a477deee8af37c1f6f60f3dff847b750df143c8e9538b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB3 4752 bytes
font_01_sfnt_off00007ddd.bin
607e24d081a82d29a028fe1fa957f1e71d86d82b137015ad00576f178ee1b0a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DDD 10060 bytes
font_02_sfnt_off0000a056.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA056 4324 bytes

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