Malicious PDF — malware analysis report

Static analysis result for SHA-256 b95a3944cca27c73…

MALICIOUS

PDF

66.9 KB Created: 2020-11-25 07:58:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e8c9845f1464af3206b109983ea23bc2 SHA-1: 4ef3dde203d6baca5ccc1de18fcefefe6a074e98 SHA-256: b95a3944cca27c732bc93e0f0454984f37fe20766146f8cbe96ec15fe275e57f
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is indicative of phishing or malware distribution. The ML classifier and ClamAV detection strongly support a malicious classification. Although no scripts were explicitly extracted, the PDF structure and embedded URL suggest an attempt to redirect the user to a malicious site, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/123?utm_term=thank+you+for+the+well+wishes+for+my+newborn In PDF document text
    • https://cdn-cms.f-static.net/uploads/4475989/normal_5fbb919083cbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_5f8c5ef0a9fd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496602/normal_5faf8d604513f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_5fa3537d27379.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/cb056329-851e-438b-b752-4c26908143dd/grace_based_parenting_workbook.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/perkins_4_108_engine.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/free_john_wick_2014_google_drive_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13e8825b-7cfd-4d00-8158-0350fa57a89b/detroit_diesel_engines_series_60_ser.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/common_core_algebra_1_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/escalation_protocol_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/chetham_s_school_of_music_guided_tours.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/red_panda_context_reverb_pedal.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/calculus_early_transcendentals_10th.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA66 5352 bytes
SHA-256: 1e6130323cf4212c5ba72b88dec8c2e448f8a424eb54e655601def97cf205c79
font_01_sfnt_off0000dc8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8A 9796 bytes
SHA-256: d741b2b0a086586ecdacaf29511baf7752895d61672f38be8393af803cf00d8d

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