Malicious PDF — malware analysis report

Static analysis result for SHA-256 c19bc97fa7850202…

MALICIOUS

PDF

71.0 KB Created: 2020-11-22 08:52:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e40ef0f0be65fe36808eca79b0fff751 SHA-1: cb6d7838d4a9483f2d0ecc432ceb7ee243ca5a9a SHA-256: c19bc97fa7850202534677fec8c9267573a38de1606c89a96fb959facbd424dd
154 Risk Score

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'. The ML classifier also strongly flagged this PDF as malicious. The embedded URL is likely intended to lead the user to a phishing page or a download site for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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=far+away+perfume+price In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421336/normal_5fb453cd4fc3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449616/normal_5fb4fce5c1331.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367947/normal_5f89119024a5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419236/normal_5f99da4723053.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375521/normal_5f93fbb411748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470961/normal_5fad9dd3a3eaa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/9bc1c273-f693-4fc6-888d-b800fa0c817d/urban_meyer_above_the_line_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a64d7ce-e9fe-4027-8f4e-138be8282873/monster_hunter_world_kelbi_horn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41f810ce-08df-4470-b5ac-5b90c91f8f1b/32419881855.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/61382723230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb8d5b5f-b856-4b65-87ff-06335287243d/kusuku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be51aa23-dabc-4d4e-938d-9e1fc2ba3133/minecraft_note_block_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1295892-3908-4644-9972-40c263308850/88477594285.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e65124f6-07a9-4a24-b907-a8887b1e39af/nanepaxilelibobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b6bab88-9689-4c89-b31e-f77c468a33a3/5148828163.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC9 4688 bytes
SHA-256: 489ea2be874c8e187de693742c173177e26f45cc9b7096dafea7e7d2c3ecaaad
font_01_sfnt_off0000dcd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD5 10564 bytes
SHA-256: c53f70d8056fe5948bcf19654c20bafc84ad111aa95b92746c6ca620c230eecb
font_02_sfnt_off000100b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B2 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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