Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2266d2794f8e5af…

MALICIOUS

PDF

34.3 KB Created: 2020-10-15 06:18:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 369f3147420e71e63c90288f28c43827 SHA-1: 963b1fbb969c328d67c822ea8f19a971df359d82 SHA-256: a2266d2794f8e5af829cea651983923983903471f8a73ea4814d1b1049a3b03d
124 Risk Score

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/123?keyword=4000+essential+english+words+pdf+download+free In PDF document text
    • https://site-1039481.mozfiles.com/files/1039481/30761333275.pdfIn PDF document text
    • https://site-1038702.mozfiles.com/files/1038702/63987414010.pdfIn PDF document text
    • https://site-1038565.mozfiles.com/files/1038565/47629939228.pdfIn PDF document text
    • https://site-1037916.mozfiles.com/files/1037916/25986628684.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/199877.pdfIn PDF document text
    • https://jewajufigojoxi.weebly.com/uploads/1/3/1/4/131438211/9d01d2.pdfIn PDF document text
    • https://site-1039612.mozfiles.com/files/1039612/69315305146.pdfIn PDF document text
    • https://site-1043203.mozfiles.com/files/1043203/44594677251.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cd050b2-14ea-4743-ae36-b71d78972b4c/susapolejefuxuzadizeje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9112/4131/files/225_75r15_trailer_tire_and_wheel_6_lug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0990/0184/files/lin_min_chen_wiki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0522/3327/files/26350109484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1874/3719/files/17584979409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2471/9261/files/age_of_consent_in_kyrgyzstan.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000477f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x477F 5528 bytes
SHA-256: e6d3c675b0d9aa2fd48a4f75afa4e6b8d635300b8e91e34c2da75c3cbfb00ba1
font_01_sfnt_off00005a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A4C 9892 bytes
SHA-256: 4f23fb89f4b1b7b0fa322d3d72af3b1d6b46c1157a421342dbbe12677ba34d69

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