Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc11753becbd6605…

MALICIOUS

PDF

63.4 KB Created: 2020-11-02 05:49:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9a162f43509ff2d919f7c7bd95a32394 SHA-1: 1796afba8179dc6242c4a0708da07cd068356a1d SHA-256: fc11753becbd660503fccb7dc0bac4ee98f137b993fb0f8fe977b24a7b605f06
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The embedded URL, 'https://cctraff.ru/strik?keyword=abortion+clinics+near+me+that+take+insurance', is the primary indicator of malicious intent. The document body text, though heavily obfuscated, also contains this URL, suggesting it is the intended lure. No scripts were extracted, but the presence of a malicious URL strongly suggests a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://cctraff.ru/strik?keyword=abortion+clinics+near+me+that+take+insurance In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373749/normal_5f8e41451474d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445101/normal_5f9e5605ca8c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378845/normal_5f8c8141d8069.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/25f7cd19-fff9-4b76-819f-6ebdb84852e7/roliligazalusatisufos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fc58751-ea18-456b-bafb-2f583662cc66/xejelokupaxiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ac46a0d-1502-493b-ae40-f97281d490ff/14692266333.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31013974-6cc8-447b-a95d-0b5150bf5d05/79804843220.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d498251-af8b-4ac2-9611-bf594c646171/moninoxetofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50f65110-ea04-4795-b07c-dccb0893713b/merur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/996c7e9e-2acc-40fc-88a0-23d18101b0cf/22471119025.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/guia_basica_para_aprender_frances.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000bf3d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xBF3D 29276 bytes
SHA-256: c9f971e039449708a6dfb0808118ea4cd90d8a2e37cb418ad0e07c9702dbfa81
font_00_sfnt_off00008b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B67 5232 bytes
SHA-256: 1bf7afe509e4511d52cd0535391e1661ee2a9f6a6aa50eb962b945ed65fb89d8
font_01_sfnt_off00009d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D04 9896 bytes
SHA-256: bb8ec355078c2511a9bef27b48deaeb0b2203e588e7907d51862e6d00cffa496

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