Malicious PDF — malware analysis report

Static analysis result for SHA-256 3073a412fe2db74e…

MALICIOUS

PDF

41.8 KB Created: 2020-11-07 18:00:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 160fd1dcde0c9f23555a5f149382789f SHA-1: e958715dbe88a2c5c0e95f3f6349bdd8427e5298 SHA-256: 3073a412fe2db74e7e54a393d09867c5bf12d3ed7aad9fcafa3e4d2b1b6ca316
96 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF_URI heuristic identified a link to 'traffnew.ru' which is suspicious. While no scripts were explicitly extracted, the PDF structure itself facilitates the linking behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/123?keyword=watch+wrestling+streaming+sites PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5f8aac34a92cc.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/ziranara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390055/normal_5f8dcba7eeee8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366973/normal_5f9f55647df66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377109/normal_5f8a062f3031a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449183/normal_5fa57e82849dd.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/559546.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373016/normal_5f8b639dc6273.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/wofaxil/memege.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/business_model_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/sixaxamed.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/maths_worksheets_grade_4.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/potato_soup_mix_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/mevidirumaluso.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/fegumot.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_off000064ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64EF 5316 bytes
SHA-256: e4a20d8c97d4ab2e8c1c1d3ed6f92ca43853fee6c172c8f8ed60c9b3cd456f32
font_01_sfnt_off000076f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F3 10372 bytes
SHA-256: f91b908b65fc7b850bae7c2ad61f9b7e8925f7f7abba8ee50a4089332a945476

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