Malicious PDF — malware analysis report

Static analysis result for SHA-256 db3c7dd6a4fd63ff…

MALICIOUS

PDF

74.6 KB Created: 2020-12-23 15:14:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 6504b8b7202d7531821d8a9068a0db9b SHA-1: b6f55639efe8f49da2e387b5b276aefa92f2e8e9 SHA-256: db3c7dd6a4fd63ffd895cbe46ddfe4d1711a6ce7b5ea977a6672345860f1b75b
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to redirector services and disposable hosting, indicating a link farm designed to distribute malicious content. The primary malicious URL identified is 'https://cctraff.ru/aws?utm_term=budismo+nichiren+pdf', which is flagged as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://cctraff.ru/aws?utm_term=budismo+nichiren+pdf In PDF document text
    • https://rosuxemu.weebly.com/uploads/1/3/0/7/130776582/bd8235088eb842e.pdfIn PDF document text
    • https://fabidarupevonu.weebly.com/uploads/1/3/4/6/134620419/6152401.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382412/normal_5fa22cf188692.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459645/normal_5fe2dc7f5a68b.pdfIn PDF document text
    • https://xotozefubineru.weebly.com/uploads/1/3/4/5/134576546/1750841.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371808/normal_5fce94ced3600.pdfIn PDF document text
    • https://kopepadozuko.weebly.com/uploads/1/3/4/5/134505487/papemepalezu_larolixana.pdfIn PDF document text
    • https://xujebope.weebly.com/uploads/1/3/4/0/134018561/9606520.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372100/normal_5f8e608b8a13c.pdfIn PDF document text
    • https://nepopuzabigeju.weebly.com/uploads/1/3/4/8/134856357/lonilipe.pdfIn PDF document text
    • https://dipakinujudisil.weebly.com/uploads/1/3/4/4/134468351/sedotokupepuwij_kared_padikinowafages_ramifosufuwo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414334/normal_5fcd300f50d5e.pdfIn PDF document text
    • https://gemigefe.weebly.com/uploads/1/3/4/6/134602098/7618874.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/xamapebonijos/vefojerimigivo.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/post_malone_hollywood_dreams_spotify.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_off0000e8b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B0 5204 bytes
SHA-256: aeb0b47864cb78b0aaced9ae957009e44171b60129de66990a4d5bceeffd8e3f
font_01_sfnt_off0000fa3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3E 10404 bytes
SHA-256: 18c59f562ba678b9b61f078262f240bda50ea7714f9872f46b93580f23a61f13

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