Malicious PDF — malware analysis report

Static analysis result for SHA-256 1911c60ded5b6e7a…

MALICIOUS

PDF

70.8 KB Created: 2020-11-12 22:13:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46ae35a036d0d995afabb1cd9c3812c7 SHA-1: 75df04896b3080ce26eabe3765b166a6c8fc5679 SHA-256: 1911c60ded5b6e7ab735ccb652de0850ee29010c3ebadef5233397b0c5caa1cf
184 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The embedded URLs, such as 'https://gettraff.ru/123?utm_term=william+bliss+volusia+county', indicate a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness, supporting the classification of this file as a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=william+bliss+volusia+county
    • https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/niviwedazisuxa_rekagokigasipas_rovozep.pdf
    • https://wunimebi.weebly.com/uploads/1/3/4/3/134361225/60cc18cc.pdf
    • https://misopiwulasi.weebly.com/uploads/1/3/1/8/131856666/suwakobadet.pdf
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/9051060.pdf
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/80846259b6.pdf
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/c04dc84919bdfb5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ce6f6d9c-1b2c-44f8-9839-d5477358019d/de_rey_de_poder_lleno_barn.pdf
    • https://uploads.strikinglycdn.com/files/8e873cc9-7ec0-413c-b468-35f21838a756/29219354799.pdf
    • https://s3.amazonaws.com/leguvefu/kedesilibadebedazaretasow.pdf
    • https://s3.amazonaws.com/pomaxa/zixurevasaj.pdf
    • https://uploads.strikinglycdn.com/files/0a9b1543-9af4-41d0-aeaa-0bb320d0b3e9/zobatagemefapugi.pdf
    • https://s3.amazonaws.com/metubevozisul/zenufo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbb0.bin
2f32373152b86590eb5c993bf8dbb57d20fc33770b92bc1ec6b5fd985d660553		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB0 2828 bytes
font_01_sfnt_off0000d5b9.bin
17740359ee5dfe1a278fcc1a8a6781f2e8ae9550bc511e1d27aeeef5fa5353f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B9 5164 bytes
font_02_sfnt_off0000e751.bin
1d4b12490ee365b1fbe448bd81a7d20e76d4249854ef9ef3238eff9775e4ec0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE751 10844 bytes

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