Malicious PDF — malware analysis report

Static analysis result for SHA-256 450f18e8925c974f…

MALICIOUS

PDF

78.2 KB Created: 2020-12-17 20:19:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d0f90205a229dd098467baf8550eaf52 SHA-1: 50ec0f13b316fd03064209d0aaa2b1d10b92b5e6 SHA-256: 450f18e8925c974f5590ef5302be8e27a113dcbdc833f45b7fdf930af308a0ea
184 Risk Score

Malware Insights

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

This PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically `https://cctraff.ru/strik?utm_term=sample+bakery+production+schedule`. The ML classifier strongly flagged this PDF as malicious, and ClamAV detected it as `Pdf.Phishing.Trojan`. The presence of multiple links and a redirector suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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/strik?utm_term=sample+bakery+production+schedule In PDF document text
    • https://dufevirefat.weebly.com/uploads/1/3/1/4/131438490/bodejakoga-nawokogone-dunekitom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445864/normal_5fc764c94621f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413696/normal_5fdadbf760684.pdfIn PDF document text
    • https://sinekagu.weebly.com/uploads/1/3/4/8/134855021/3955b55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412183/normal_5fcaef21deb2a.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/suradinazusosaso.pdfIn PDF document text
    • https://memezuwiz.weebly.com/uploads/1/3/4/7/134702577/5534739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f8724fdcca68.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc052d83dfdd95b60d21819/t/5fc3957abc819f1cf4470048/1606653306380/mokalokefajunokuwese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a37db67d-3f2d-4f8f-a899-606b21f206bd/16493341255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d31e3d5c-928f-4c36-bc04-03e1dac1168c/zuguximojijem.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59e7b12facd59cecd2c13/t/5fc73788ad3e64119241b82c/1606891400468/bijofoxesaputizefoz.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/xezololamip.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA5 5724 bytes
SHA-256: fc8c3c97f3db8cd09e1ff09b3723dd7430c7728684d3de592c53bb6199f86c2b
font_01_sfnt_off0000e2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EC 3896 bytes
SHA-256: 805ea5bac8a2bc509d41582fae72cbb30bba36e200b015d9ddd4efa930fb2c18
font_02_sfnt_off0000ed0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0F 10808 bytes
SHA-256: a60576154cd37b4925fcfb4774e4b6273952cb6fa78e1bfcf2b6685100b9ec78
font_03_sfnt_off000111f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F3 17268 bytes
SHA-256: 24d40f586688bf6a360728097dd0e90c3d5233bb60bc02fe5bccda6e54bb9a7c

Open this report in the interactive analyzer, or submit your own file for analysis.