Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0654a77c27dd3d4…

MALICIOUS

PDF

43.1 KB Created: 2020-11-09 12:55:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 41e2d3ef6b24657275786468cfc1c677 SHA-1: 186322e2ac72e851552de23634b124363738e3a9 SHA-256: f0654a77c27dd3d434a080a1e841808b222c7dd1dd64abf7475038be836bf058
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by an ML classifier and contains multiple embedded links. One of these links, 'https://cctraff.ru/123?keyword=what+comes+after+trillionaire', points to known malicious redirector infrastructure. The document also contains a large number of external PDF links, suggesting it is part of a link farm designed to distribute malicious content.

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://cctraff.ru/123?keyword=what+comes+after+trillionaire In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369654/normal_5fa35aa48856f.pdfIn PDF document text
    • https://xogunepole.weebly.com/uploads/1/3/4/5/134529021/xigixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421335/normal_5f9b3b0e827ce.pdfIn PDF document text
    • https://pufetebad.weebly.com/uploads/1/3/4/7/134711346/xejabe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393925/normal_5f91f1902d7e5.pdfIn PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/dudurojasav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/pg_tips_tea_bags.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/dixukogenuxiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0434c82-0c23-434b-a21c-fe5a2faea750/english_grammar_test_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baf9836a-29e1-4d04-b744-6d1824c46118/nezotutaredeval.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8dc02e9-31c3-440e-a5b5-766531ad2ec7/north_ridge_elementary_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1423f455-228f-42bf-a583-8392d223625b/rikiwosimixatowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56db203b-da2c-4cb9-85e4-26aa909d65b7/dobatiram.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_off000068cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68CF 5136 bytes
SHA-256: 61b8203cf22275bc562f2b156295844e637a14948c2ea623d6809f472914bf0e
font_01_sfnt_off00007a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A27 11048 bytes
SHA-256: 533747b08fc440b21684b99aa5253345aaba18be0be647a2d33b94593721dc11

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