Malicious PDF — malware analysis report

Static analysis result for SHA-256 634f1b233ff824e7…

MALICIOUS

PDF

49.3 KB Created: 2020-10-30 15:38:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 65be92e42c5f4a3e8d34b3f4067941e7 SHA-1: b252a7b34f3ef52051ede8d750bd18a0a733a525 SHA-256: 634f1b233ff824e7159fbf8d97cfcf9d3a80f36f7dd550f7e7c6b89e69d018cc
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a significant number of embedded URLs, many pointing to redirectors or other PDFs. This suggests an attempt to manipulate search engine results or distribute further malicious content. The presence of a URL pointing to 'cctraff.ru' with a 'positive youth justice' keyword indicates a potential lure or phishing attempt.

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://cctraff.ru/123?keyword=positive+youth+justice In PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/ralomudep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425933/normal_5f98fbafa6f60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420903/normal_5f9b2cc42240a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383924/normal_5f91d9327cbe8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389582/normal_5f948210bfa22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f91adeccf228.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393883/normal_5f8f8770347ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415081/normal_5f9bdda448aa5.pdfIn PDF document text
    • https://puniduvete.weebly.com/uploads/1/3/4/3/134341297/9022386.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376379/normal_5f96360a558d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379603/normal_5f930dd930c32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387806/normal_5f934b4d4fa23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370525/normal_5f8fd5c511660.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/287a00c8-ab1e-4ee5-9675-3770d1fd38cf/gosar.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/bosch_intrusion_alarm_system.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F0 4564 bytes
SHA-256: fe2edba7dbb44b77220cab7c1f8ae761a34a29f539820bcdd06055b20c253729
font_01_sfnt_off0000869d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x869D 10380 bytes
SHA-256: 3c1f6ab934b56966bde31ccba334eb58ee27b4709e318c0b27c6056a3a08ad52
font_02_sfnt_off0000aa00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA00 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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