Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3ea6b49a00b6eb8…

MALICIOUS

PDF

71.2 KB Created: 2020-12-28 21:41:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 44259a81c9dbfad11fe9c63f3d496886 SHA-1: 1046d0ce357a49df94fe06b60eafeebcd70b566d SHA-256: d3ea6b49a00b6eb82a2d287266033db6b43dfff554af0d3388de6ecf2d51e012
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and a machine learning classifier, exhibiting critical heuristic firings for malicious redirector links and a link farm. The document contains numerous embedded URLs, including a redirector to 'traffmen.ru', suggesting an attempt to funnel users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffmen.ru/123?utm_term=mega+man+video+game In PDF document text
    • https://pagofere.weebly.com/uploads/1/3/1/3/131398194/ccb1bcec832e5b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388827/normal_5f9283bec4902.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443362/normal_5fa1197c46d49.pdfIn PDF document text
    • https://cdn.sqhk.co/sirazisiluz/REs0ADa/dominos_delivery_jobs_london.pdfIn PDF document text
    • https://jazelisis.weebly.com/uploads/1/3/4/8/134870131/nibexexibez.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/novovuxosijuzuz_wofabunutigepuw_dugulelura.pdfIn PDF document text
    • https://radamafusutu.weebly.com/uploads/1/3/4/6/134668344/tevuwixupe.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/mixeno.pdfIn PDF document text
    • https://cdn.sqhk.co/sakiforivona/wiegcjc/that_s_all_thank_you_in_spanish.pdfIn PDF document text
    • https://cdn.sqhk.co/kanedufopuma/3MknjjV/vodijowuxel.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/retisovojor/zojetotuzo.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/5718991568.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/39023844260.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_off0000db99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB99 4904 bytes
SHA-256: 303b51f19c8c2f5cfc228ecbf96757285f88422659e90cc246647f50ccb8f020
font_01_sfnt_off0000ec50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC50 10340 bytes
SHA-256: 0759e73933167ded0300ccb1b50aa60a024f9ddf743ecf1db07777caf5484479

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