Malicious PDF — malware analysis report

Static analysis result for SHA-256 944da51076d8b866…

MALICIOUS

PDF

77.2 KB Created: 2020-12-27 06:14:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e3d28cce5091cfe861d290b057a7d01 SHA-1: e79becde87b36c454594fd40f8c6c0a6e30db670 SHA-256: 944da51076d8b86655586aaf12e0af5deeea4983c00188cdcf11ff096c81f652
214 Risk Score

Malware Insights

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

This PDF file was detected as malicious by multiple heuristics and a machine learning classifier, indicating a high likelihood of malicious intent. It contains a link to a known malicious redirector, ggtraff.ru, which is likely used to funnel victims to phishing or malware download sites. The document also exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, suggesting a broad attempt at distribution or SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/strik?utm_term=online+video+call+only+girl+app+free
    • https://zuxutupod.weebly.com/uploads/1/3/4/5/134587355/nuvojamuzazojujar.pdf
    • https://cdn.sqhk.co/wevexifimur/aNjgVhc/47157193177.pdf
    • https://cdn.sqhk.co/koxixoneto/ig5idQU/video_player_for_android_2._3_5.pdf
    • https://fopimakalegej.weebly.com/uploads/1/3/0/7/130738542/mixerorepazeza-sipevoze.pdf
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/zofesaker.pdf
    • https://pudegubazamase.weebly.com/uploads/1/3/1/1/131163945/xetopolofutupit_lejikadezuvez_lojoludegef.pdf
    • https://towipikegogu.weebly.com/uploads/1/3/4/6/134690187/jidafogulebuniw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/a84feb31-c3cc-4e06-907c-ab75cd80592c/fonudibevunef.pdf
    • https://uploads.strikinglycdn.com/files/e0522797-0862-4d8f-a3a7-e5f2e4c0e37a/banuzineweferofinaliwewit.pdf
    • https://uploads.strikinglycdn.com/files/a67b5259-c2b6-459b-81f5-42c1d3d8e2ae/begerivolelizaxirajetekot.pdf
    • https://uploads.strikinglycdn.com/files/6d43056b-d372-4fd3-a82f-78d7fcd7408c/935_dispatch_wordpress.pdf
    • https://uploads.strikinglycdn.com/files/d1fe41f0-630e-4429-9fb3-b7b2a0b8e347/62962246678.pdf
    • https://uploads.strikinglycdn.com/files/cddf952b-85b7-421b-af49-17b69694ad8b/jejuxupobuburizagun.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4d9.bin
147f3da28866de351c665b05bbc1437a92a984b7e3084dabd2ed2f62ac070077		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D9 5040 bytes
font_01_sfnt_off0000f613.bin
298f1c48c2b9c7e6b48f8a7eaf1db2174c22610efe857e78dee706e42d1e27da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF613 10428 bytes
font_02_sfnt_off00011987.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11987 4324 bytes

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