Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ded754cc58073bc…

MALICIOUS

PDF

71.5 KB Created: 2020-11-11 08:43:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1533bffd1a9d8cefb1f57e8c99833528 SHA-1: 78d58c08ddbcbdba6ed429185f084ed8d9ef1d8d SHA-256: 9ded754cc58073bcee11c620b076e9baa0a8e110365c89ea5839810ce94e7590
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 content, though heavily obfuscated, appears to be a lure related to 'TV guide' content, directing users to the URL https://traffine.ru/123?keyword=tv+guide+79904. The presence of numerous embedded links, many pointing to external PDFs, suggests a link farm or redirection strategy to distribute malicious content or conduct phishing. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://traffine.ru/123?keyword=tv+guide+79904 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368971/normal_5f87efc702be2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408355/normal_5f9499497b951.pdfIn PDF document text
    • https://jipemovikeral.weebly.com/uploads/1/3/4/0/134012889/afe3e.pdfIn PDF document text
    • https://motadali.weebly.com/uploads/1/3/4/3/134368257/xeveviduwake_giwoxurozol.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/0d8f3df0-31f2-4248-a6ad-966b42a542b2/gofibusojonejovejiwebev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85413a05-fb87-4ff3-a587-19860b45d29b/biminavanevuzageregeno.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/santa_worksheets_preschoolers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbd76761-28b0-4ad6-a1da-e8e260ad72db/bodinupusisof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9950591-4e83-4ab4-b211-2a216da4130f/vebumofudebemufusatat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c79f8404-5b47-4a9e-af80-ad331824185f/nukomarobiduti.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/live_african_nightcrawlers_for_sale.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_off0000d700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD700 4952 bytes
SHA-256: 6b67b321230c7b48b9d820ab15c6fc1ad3a5b69238a5ae5580fb6f13a3d917dd
font_01_sfnt_off0000e808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE808 12980 bytes
SHA-256: ea58af610fdc1ae1ec4b54b66b6b2aec935c979e72b10209164d55521fb4e852

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