Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b10e3c5630c27c9…

MALICIOUS

PDF

64.1 KB Created: 2020-11-18 11:55:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8800d4d6e25af79b92a80655c84aacae SHA-1: bd03e30fa04cce4f125f0ab91aaf449270e29d86 SHA-256: 3b10e3c5630c27c9fe1e99d0f23a8e7eac3e024b47d2c5f0bc8f4e9d347e6f9d
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. This, combined with a high ML classifier score and ClamAV detection, strongly indicates malicious intent. The embedded URL is likely part of a phishing or malware delivery chain, attempting to trick the user into downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=cootie+catcher+fortune+teller+templa In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f87404e72716.pdfIn PDF document text
    • https://wajifisawebe.weebly.com/uploads/1/3/4/4/134480175/7804042.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372673/normal_5f9e50532d413.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366316/normal_5f89aab049aca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f88cc23a27ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414357/normal_5f9ec932da064.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/25f906d8-059b-4ed7-bbcb-5fe08873f15b/lowolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b538ed8-7b2b-4f3e-9fe7-c9a91c9087b2/47951701976.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/kevivokubuzamevesapa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89d62f98-6ec2-4607-a451-b9223836bb0b/django_framework_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46bc7ab7-d75d-46bb-ad6e-8c6b5900ebad/number_classification_worksheet_answer_key_algebra_1.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/alchemist_s_supplies_dnd_5e.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/facts_about_arizona_black_rattlesnake.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_off0000c031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC031 4980 bytes
SHA-256: eb2b2161495bdbcc3e49ad14d6d47f36d363baac48b89d8028a2ab09c8b4f56d
font_01_sfnt_off0000d0f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F6 10164 bytes
SHA-256: 100f1b1a83580b2fe6df17371aa991e5510d86f45944f3de141a621f46da7008

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