Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e5336960153a53f…

MALICIOUS

PDF

63.1 KB Created: 2021-01-07 05:27:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d3e6992f41f6455b758ab215f65b5b1c SHA-1: 71d1afdb67405daf9abb5a4b4238a85e4a1bd6a1 SHA-256: 8e5336960153a53fa7225b22e2fe58ee7a47540767d3a546be299e5674cf23be
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link to a known malicious redirector, ggtraff.ru, which is likely used to distribute further malware or phishing content. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, suggesting an attempt to manipulate search engine results or distribute spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://ggtraff.ru/123?utm_term=maytag+bravos+xl+dryer+not+heating In PDF document text
    • https://cdn.sqhk.co/regavebike/cghNUhh/wunoz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475872/normal_5fcecdc2986d2.pdfIn PDF document text
    • https://cdn.sqhk.co/sebazisop/fihjjig/finipizuroxilugurem.pdfIn PDF document text
    • https://cdn.sqhk.co/gewurasi/pjjheha/10502412954.pdfIn PDF document text
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/6229393bf04.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/38936c48-a1fb-4b2e-9407-94ba444649ab/purple_tablet_recipe_subnautica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3f96f64-7b95-4895-b80d-5d3a94a7a227/gangster_spongebob_shirt.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/3502906120.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d199dd2a-8c6c-405f-af7c-87b2538eeac3/jijekozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef8a6ec6-daaa-4e88-80a1-63cd6e823217/33621690899.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c58003c-c82a-4dd0-9fa6-5d26a60c5655/world_war_1_study_guide_with_questions.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_off0000bc63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC63 5460 bytes
SHA-256: 86bbeb281f0bc83709574713d12b279dd40b8bad681fb9ebdb1073ef2f37c563
font_01_sfnt_off0000cf07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF07 9532 bytes
SHA-256: fc986733c2b4d228bbaddcebb63f461f474b8163cd53d349bcfb862d84b3479b

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