Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcf0945ce460e49b…

MALICIOUS

PDF

55.7 KB Created: 2020-11-06 22:21:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c9b66b06c0efe950492c3127f3585d37 SHA-1: 47cc62c2f48f06ac98fcd63a1555f0902b913fa6 SHA-256: dcf0945ce460e49b7e2d892138d56bea956ac262a3620196d03c49e7b80fb0af
154 Risk Score

Malware Insights

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

This PDF document contains embedded links that redirect to known malicious infrastructure, specifically 'gettraff.ru'. The document body, though heavily obfuscated, contains a reference to the same URL, suggesting an attempt to lure users to a malicious site. The presence of multiple external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

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/123?keyword=possession+1981+movie In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f8715afe9a7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f94fc40f09a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380082/normal_5f92d4848837a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380543/normal_5f8d2d5ea6d61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374374/normal_5f8b0e62426d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386836/normal_5f9eb5d3ac27c.pdfIn PDF document text
    • https://jawokipuroz.weebly.com/uploads/1/3/4/2/134265350/migalibexesiku-ginorexilux-turibumopamado.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387226/normal_5f8f9925760b6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://pazeden.files.wordpress.com/2020/11/86767518253.pdfIn PDF document text
    • https://guveker.files.wordpress.com/2020/11/pefolelotozidet.pdfIn PDF document text
    • https://malopotobi.files.wordpress.com/2020/11/99145031556.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/educacion_y_neoliberalismo_en_mexico_jaime_ornelas.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_off00009575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9575 4956 bytes
SHA-256: f8fbac847cda2e40843b3ab0e481b89840454ecb3520f12c2161c9bea204df3a
font_01_sfnt_off0000a655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA655 14076 bytes
SHA-256: d8405630b6da768a23807c9887d4c069d8762e2c79a581e9a591bc559273b6c6

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