Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceff793d5d854f02…

MALICIOUS

PDF

58.1 KB Created: 2020-12-21 16:07:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8d8bdf0819545463c66c1a0c0e48d22d SHA-1: 531305f4796e31a9dc15d4c411b21931bc1c58ca SHA-256: ceff793d5d854f02decb38dd7c84179d134f50ef4b3be0bbf1a1f1879c4a1d0f
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The ML classifier also assigned a very high probability of maliciousness. The document body contains garbled text but the presence of the URL 'https://gettraff.ru/wb?keyword=faze%20trickshotting%20map%20code' strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/wb?keyword=faze%20trickshotting%20map%20code In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383449/normal_5fbd680b2178b.pdfIn PDF document text
    • https://ronurakegilapoz.weebly.com/uploads/1/3/4/8/134852428/kizijig.pdfIn PDF document text
    • https://kifirazet.weebly.com/uploads/1/3/4/7/134715796/pafumo_zasibevuvap.pdfIn PDF document text
    • https://pevusipifo.weebly.com/uploads/1/3/4/8/134863194/xisufetar-nawepafipu-jixolonexad-xuwixomo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375700/normal_5f89e4ca51643.pdfIn PDF document text
    • https://kusopexel.weebly.com/uploads/1/3/4/5/134526262/kipolobumokogov.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/c096c367-ffab-47aa-842e-eee451f1c915/pekim.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/17808570210.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfd8ddae50a014587710b/1606221198942/voremodedifonisus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea95602e-b3ab-487f-accc-8a230420a74f/zibafidakolezik.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_off0000a56e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA56E 5524 bytes
SHA-256: a0065cea811649919bbc97d4be53b98beac75180090c5fb439c3e8fdb7ebe32d
font_01_sfnt_off0000b820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB820 10516 bytes
SHA-256: 78d5fc8a8871ffffaaf815b1fa887b663ea8790588d6b8350d903cd4bbe4e398

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