Malicious PDF — malware analysis report

Static analysis result for SHA-256 33ff0fcb1df2eb7d…

MALICIOUS

PDF

73.1 KB Created: 2020-11-29 02:47:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1df0f6502d77b49b23b9af171ba3b65e SHA-1: 01b2614902972387e4ca1befdce53346aa58726b SHA-256: 33ff0fcb1df2eb7d49ed1c85bce46c0b5cc213065252d8550c8790a268590b84
214 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics as a malicious redirector and a link farm, indicating a phishing or scam campaign. The embedded links, particularly the one to 'ggtraff.ru', are identified as malicious. While no scripts were explicitly extracted, the nature of the PDF and its numerous links strongly suggests an attempt to lure users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/wb?keyword=android%20os%20for%20raspberry%20pi In PDF document text
    • https://cdn-cms.f-static.net/uploads/4443809/normal_5f9f6a28f09d8.pdfIn PDF document text
    • https://zufikuwokuz.weebly.com/uploads/1/3/4/5/134522796/sijekapinemanav-loreve-zodudavodazasep-matetorijazitu.pdfIn PDF document text
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/lexajuxuwedupu_gefajinuvuf_nofuwekinafe_pimedi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381085/normal_5fc16c037ad1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370791/normal_5f8a540c9b4ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371004/normal_5f97ea3004dc3.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/87bd6b6f-a38e-49a1-b852-423c46e74fed/96722887871.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/south_africa_vs_new_zealand_rugby_live_stream.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/lol_malphite_guide_deutsch.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_off0000d494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD494 4940 bytes
SHA-256: 9e35618213c1558980e615dd14ae5576bd76a988f0c0f01626e9e7d6caa84d0e
font_01_sfnt_off0000e563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE563 10684 bytes
SHA-256: 636445b22ffcb002fcf62dee643f27229a8b9de611e82ea82f535de44626f6a5
font_02_sfnt_off000109c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C3 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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