Malicious PDF — malware analysis report

Static analysis result for SHA-256 47a4e6896a439dbc…

MALICIOUS

PDF

59.3 KB Created: 2020-11-14 11:21:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 443da9f607701e25cd3bdc8db5e7b5ea SHA-1: 1cd94f0e705a381d0a2ddb174f02403d0e9739e9 SHA-256: 47a4e6896a439dbc012ebfd31a64d76015008cf1cd102ca0f5622db908281506
214 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, including a known malicious redirector at 'https://gettraff.ru/123?utm_term=fsu+health+insurance+card'. The heuristic firings indicate it is a malicious redirector and part of a link farm, suggesting an attempt to drive traffic to potentially harmful content. The ML classifier and ClamAV detection strongly support its malicious nature, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/123?utm_term=fsu+health+insurance+card
    • https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/nuvomuko-luperurozalubi-ladep.pdf
    • https://cdn-cms.f-static.net/uploads/4459629/normal_5fa668f374606.pdf
    • https://cdn-cms.f-static.net/uploads/4372399/normal_5f8e192cdd4fb.pdf
    • https://sazoxizifa.weebly.com/uploads/1/3/4/5/134505384/ee2d2b0adb7b13.pdf
    • https://gonoloxezejuje.weebly.com/uploads/1/3/1/4/131410007/849680e3bdc5926.pdf
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/bugesewuferapa.pdf
    • https://gikudinok.weebly.com/uploads/1/3/4/7/134730402/vofetazijosopim.pdf
    • https://cdn-cms.f-static.net/uploads/4385038/normal_5f95f3b77670b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tadovu/97690194006.pdf
    • https://uploads.strikinglycdn.com/files/37aeb065-db55-440c-8b38-d2005376c890/26450361387.pdf
    • https://uploads.strikinglycdn.com/files/e2c98217-9ad7-4608-a2ba-a2bf49d04f97/gavof.pdf
    • https://uploads.strikinglycdn.com/files/e1d40155-8344-4822-a12b-78b4336c87c9/3396801353.pdf
    • https://uploads.strikinglycdn.com/files/433aa615-50b5-4cf4-a88e-63b1665cc96b/james_remar_movies_and_tv_shows.pdf
    • https://uploads.strikinglycdn.com/files/289a9289-8c5f-47d5-9444-e20722f58e7b/telugerapu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000afd9.bin
e1338173ae3bca2b13280c92ea49f5b36de3d19c12d537974600a08f00952869		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFD9 4980 bytes
font_01_sfnt_off0000c0bd.bin
23472893f6dec1591628cc21a195e8281217d3972aa16061d4b7d831d12cd95f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0BD 9272 bytes

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