Malicious PDF — malware analysis report

Static analysis result for SHA-256 447175382a381b59…

MALICIOUS

PDF

72.5 KB Created: 2020-11-20 07:55:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4ee780af1de0ce1ff813c896fa916b6e SHA-1: 156b3f2be9fe22f927d2c299fbea2142b06e9f75 SHA-256: 447175382a381b59fbf81815dd09010f802060645f1d3d10ddc190e6962055f5
222 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'cctraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, one of which is 's3.amazonaws.com/takebemanijewok/minecraft_magic_school.pdf'. The ML classifier also strongly flagged this PDF as malicious. These findings suggest the document is designed to trick users into visiting malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/aws?utm_term=mariam+khan+reporting+live+serial+song In PDF document text
    • https://zaxanedipujez.weebly.com/uploads/1/3/4/5/134582154/zizipawakelifote.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426413/normal_5fabf873d1fa5.pdfIn PDF document text
    • https://gabexilo.weebly.com/uploads/1/3/4/1/134109250/25c0d65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366336/normal_5fb5653f3f619.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412899/normal_5fa8e69b602d8.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/takebemanijewok/minecraft_magic_school.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/bevodipege.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/greenworks_pressure_washer_support.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eaa5ad7-378b-4e03-ac88-d7893411eacf/armando_moncada_md_georgia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/404f920d-9f83-4499-9fc0-8014bfd872cd/6428683899.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/early_civilizations_timeline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d618eb2-7951-4c14-9b60-c41c1c246b4f/mockingjay_read_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/80195582296.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/wibikinixo.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_off0000df44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF44 5364 bytes
SHA-256: 9af9fdf95315f031f9a04cdfc1b1aef3a4e2aa2afda670368009ee3f86eefa8a
font_01_sfnt_off0000f16c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16C 10520 bytes
SHA-256: 9c6f764aabe3306aaff828632f74412fc2a7ac385f0482711b5e5bb838cc199d

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