Malicious PDF — malware analysis report

Static analysis result for SHA-256 404d9e88621bff30…

MALICIOUS

PDF

65.4 KB Created: 2020-11-18 18:06:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: efda15c25868f3ae8ef932d6f4d3980c SHA-1: 1906e1a5eb483e4a598dbea76a65c979a2a7cb20 SHA-256: 404d9e88621bff306b1f520e98217d402907a94ed6d5ec3f0130546bb85a8093
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The embedded URL points to 'traffking.ru', which is likely part of a link farm designed to redirect users to potentially harmful content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffking.ru/strik?utm_term=orc+vs+parquet+vs+avro+performance In PDF document text
    • https://cdn-cms.f-static.net/uploads/4463005/normal_5fabe2f7dc2b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380226/normal_5fad5c9c6d038.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_5fa364ad094c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415077/normal_5f97b438ba5cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5f9915b0c2d2c.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/c2f7ab874dd1f.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/43fb4c73-74e5-4029-94b9-f23fdf92d1c9/69541967755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bcf539f-f1b3-4355-89b4-6c2eb655ecd2/fiendish_codex_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec223397-7369-4303-87ec-89d2cfc0b7cb/56478926962.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ae15863-52ea-4e17-8f91-245d309d514b/arbonne_independent_consultant_commission.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/drawing_right_side_brain_viewfinder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc246ecf-b3e0-4721-8219-d22efdfccda1/nutorigivipetizokes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aeeae28-cb11-450f-a973-801230fdfe9f/epica_discography_blogspot.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_off0000c492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC492 5340 bytes
SHA-256: 536d8550ebfb43f4dc4f9908d73897f3737f18c64702f9e8d4456bc0d46df601
font_01_sfnt_off0000d6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B8 9976 bytes
SHA-256: 6ada44298638c7f804ea96cade5950e6eec26196cbabd1627eb7e0e97f1898a8

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