Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4c8be975b86796d…

MALICIOUS

PDF

191.3 KB Created: 2020-10-04 07:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3cd088cd4c499e4656a9c4c818d44e2b SHA-1: fbf11c2fc8165eb248de145a395bf2f3bfafce57 SHA-256: f4c8be975b86796dae58ea73a6a163abb0ac8cc05af7ff380fe8b2fdb4267f85
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link to a known malicious redirector infrastructure, disguised with text related to police calls for service. The ML classifier strongly indicates maliciousness. The embedded URL is the primary indicator of malicious intent, likely leading to a further stage of attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • 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=knoxville+police+department+calls+for+service In PDF document text
    • https://site-1039694.mozfiles.com/files/1039694/38346184979.pdfIn PDF document text
    • https://site-1040286.mozfiles.com/files/1040286/gidegutoluwolu.pdfIn PDF document text
    • https://site-1036743.mozfiles.com/files/1036743/76064307909.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c2186765-d34d-4783-8f50-7fa0bf8efb22/12802070311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ef94968-d600-4d38-98d6-1a63ba2afdd9/zuwokewepeximake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a02dded-16f1-48bc-b8b8-caa120e02a01/fojafof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4944/6307/files/nufajipusuxinono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2864/6552/files/31688784736.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0308/4451/files/13017881225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/6824/4135/files/jurassic_park_piano_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45ca5589-ee1f-4d2d-bbbe-60bd4871d7e6/59947126222.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef174503-f8d3-47cf-862c-5bb670451b60/tewoviw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/138f2a73-610f-4f67-b6b9-f7849386dc02/24362843902.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b943421c-fdaa-4b6f-aae0-6a2796b999c2/kulezitagiwikutipid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db1e5992-b8f6-4883-88dd-e8aa622d3fbc/fimodavopup.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002aaa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AAA4 5184 bytes
SHA-256: 044a90c334ae9bada8e6b5462f2709933c1d65d3f35ed4191f31d9c115ef6c8b
font_01_sfnt_off0002bc2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BC2E 10756 bytes
SHA-256: 90cde3a117804d1e6b2425807dda546916f1d98b710c14e91a07e3b03ad9974f
font_02_sfnt_off0002e0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E0AF 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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