Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a15123efc407627…

MALICIOUS

PDF

43.8 KB Created: 2020-09-02 06:39:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d74dcae9f4d2bff976a9633343438a69 SHA-1: 5f5afe1a07da5818394976bc03d4b6f3ed8f87d1 SHA-256: 6a15123efc407627aa96d727e94411bd0eff755cc92e7600f365d53bae14170b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links, masquerading as a cover letter template, to a redirector service known for malicious activity. The document body and embedded links strongly suggest a phishing or scam attempt designed to lead users to malicious infrastructure. The presence of a large number of external PDF links further indicates a link farm or SEO manipulation tactic.

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.club/pify?keyword=cover+letter+template+free+uk
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9365/5716/files/82002787862.pdf
    • https://cdn.shopify.com/s/files/1/0438/1288/0544/files/32366520542.pdf
    • https://cdn.shopify.com/s/files/1/0436/8538/0246/files/82311440645.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/18972992406.pdf
    • https://cdn.shopify.com/s/files/1/0434/5026/9849/files/gogotezev.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4453/files/criminal_justice_reform_law.pdf
    • https://cdn.shopify.com/s/files/1/0431/0335/5034/files/bonekaxuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0256/8599/files/97628861254.pdf
    • https://cdn.shopify.com/s/files/1/0459/1756/9173/files/aplikasi_geogebra_graphing_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0439/6243/3694/files/ages_and_stages_questionnaire_8_months.pdf
    • https://cdn.shopify.com/s/files/1/0430/9463/8749/files/13238970959.pdf
    • https://cdn.shopify.com/s/files/1/0432/5592/2856/files/99762997350.pdf
    • https://cdn.shopify.com/s/files/1/0440/8036/5733/files/sigmoid_activation_function_keras.pdf
    • https://cdn.shopify.com/s/files/1/0431/7780/3931/files/varyag_guided_missile_cruiser.pdf
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/11456300359.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/correlative_conjunctions_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/1899/3320/files/kefisi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7225/7181/files/xbox_360_mod_ship.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ee9.bin
ffe51d52b9c0da8fb1488c684755aeb57d13ab65de760037b09d6069a99c8751		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE9 4896 bytes
font_01_sfnt_off00007f84.bin
75a8d76ffc9ec54998a9a208a8293b285b71b3ade6d9c36237d9166e46587ba5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F84 10240 bytes

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