Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bada2d50449a8f1…

MALICIOUS

PDF

71.7 KB Created: 2020-12-24 01:40:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f898c5d18ff9a717c78754b1953ee126 SHA-1: d45eb021dada0582349059dd7f5ff8f6d6c0f809 SHA-256: 6bada2d50449a8f1feaaecebdc6e216c4a7b944de15a288dc461b8000bd4e3eb
244 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded links, such as 'https://traffmen.ru/123?utm_term=schwinn+420+elliptical+reviews', suggest a phishing or ad fraud scheme. The presence of numerous links to external PDFs indicates an attempt to distribute traffic or content across various disposable hosting platforms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://traffmen.ru/123?utm_term=schwinn+420+elliptical+reviews In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379048/normal_5f967c1b33d21.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409627/normal_5fcdb7a1d2eb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384036/normal_5f8d1f46469fe.pdfIn PDF document text
    • https://pepomujotopulog.weebly.com/uploads/1/3/4/8/134873529/2fe2d88606a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370053/normal_5fc6b6c34bf29.pdfIn PDF document text
    • https://volejodanuba.weebly.com/uploads/1/3/4/5/134593723/fudifilevojaferemegu.pdfIn PDF document text
    • https://xukolewijox.weebly.com/uploads/1/3/4/3/134320036/2dd5ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413583/normal_5fc73335cee2c.pdfIn PDF document text
    • https://luxapojago.weebly.com/uploads/1/3/4/3/134327771/6c2a266c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416136/normal_5fa9abe3f2551.pdfIn PDF document text
    • https://kejedaxuz.weebly.com/uploads/1/3/4/3/134355680/wesowo-puketavulit-suvopugol-kalawoxukuxunu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422877/normal_5f96f813819b1.pdfIn PDF document text
    • https://jugubiwujivivej.weebly.com/uploads/1/3/4/3/134352954/gopenifame-wavova.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/7615efa6-b889-45db-aec5-6af6fcc51ece/zosezopufalusofixafuxawar.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_off0000ca34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA34 5316 bytes
SHA-256: 49ac38fb196c6b606866b143911ad5fcac659f5479a887c648423e46cb546d98
font_01_sfnt_off0000dc40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC40 11136 bytes
SHA-256: afa04dfbe147822228f1942af1038833b6a8f0d13e5853eda8d185367ec91c81
font_02_sfnt_off00010232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10232 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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