Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ba770466d9a4453…

MALICIOUS

PDF

71.5 KB Created: 2020-12-28 03:01:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ea76031dc784d9d251f6104e6226afc6 SHA-1: e89992eb0301ee3dbb4b860056dcbb7c9a252c3e SHA-256: 6ba770466d9a4453a74e560deab1206ad515fa37ae012c129a3012c2d1a0a44d
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on link farm domains like weebly.com, suggesting a coordinated effort to redirect users. One critical heuristic identified a link to known malicious redirector infrastructure (ggtraff.ru), and another flagged the PDF as a link farm. The ML classifier and ClamAV also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=splashlearn+decimal+games In PDF document text
    • https://fawurefo.weebly.com/uploads/1/3/4/4/134441885/2148392.pdfIn PDF document text
    • https://livadasim.weebly.com/uploads/1/3/4/3/134312527/1620156.pdfIn PDF document text
    • https://fojaruzagix.weebly.com/uploads/1/3/1/3/131379198/ruwudazonevo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f8dd0c944704.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_5fc3496904936.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404514/normal_5f93783f9d1da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384029/normal_5f95bb54b5c17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489722/normal_5fde82f8932f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380881/normal_5f8ce7c43a013.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370284/normal_5fbe078fc047e.pdfIn PDF document text
    • https://tapukinag.weebly.com/uploads/1/3/1/6/131606864/lodasi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/fawidezaduzedi.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/18_wheeler_games_unblock_cool_math_games.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/legisonapep.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/amount_of_substance_questions_and_answers_aqa.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 8

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_off0000dae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE0 5592 bytes
SHA-256: d8b411d1fd0b175793dd6fb5749d7bfef92c70e4e84b56bfe1dee254d846ae6c
font_01_sfnt_off0000edae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAE 10428 bytes
SHA-256: 0f4a5e0e37bfdf7a4682ca2e89cdddba83dc4ff832ffe10bb318de3ff427ec1f

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