Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f97a0034f62f41c…

MALICIOUS

PDF

73.4 KB Created: 2020-11-04 15:22:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f7dc8d9eb3f729628e1da2d496ee7b72 SHA-1: e72ddb197d166d1812045da1e13f093c0de53c70 SHA-256: 9f97a0034f62f41c03f6c9e211a843182810059712df47400470ea30f50c0454
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, including a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://gettraff.ru/aws?keyword=teddy+roosevelt+jr+d-day', which is flagged as malicious. The presence of a large number of external links suggests a link farm or SEO poisoning attempt to drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://gettraff.ru/aws?keyword=teddy+roosevelt+jr+d-day In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f87307264db1.pdfIn PDF document text
    • https://bameveba.weebly.com/uploads/1/3/4/1/134108569/d9372.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373757/normal_5f89d8422347e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f8f84a690255.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368732/normal_5f878d08f0016.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5f9746bd6beca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379982/normal_5f8b3522aa9df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378619/normal_5f8e7f8d5dcc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380214/normal_5f92977c45d12.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/06875d61-8cb3-42eb-a24d-1e2672632500/tilebafit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a900183b-2f75-4244-af4b-ef6787078309/titanic_pelicula_completa_en_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85883362-1e61-4eea-bf02-9a9fd0acf3d4/44054629476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2e48b43-3bed-4813-850e-75ee3e365f31/302-351-5932__-5981.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_off0000e13f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13F 5036 bytes
SHA-256: 95a2354ac939f46eb4c25897b9e362d6ae86cad9eb9a14f580ed5f3ca21e75eb
font_01_sfnt_off0000f286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF286 11392 bytes
SHA-256: 73338e4e1ea8c43ad9a2e91cbf5b98914d28cad6235bd6b222b8fbe6f1764539

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