Malicious PDF — malware analysis report

Static analysis result for SHA-256 673cdb08f7f0b475…

MALICIOUS

PDF

68.0 KB Created: 2021-01-06 05:30:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 852379bcad8d29218191522198a77e94 SHA-1: eabd874c15b1798e2eaaa3b19b6c79794daa2bac SHA-256: 673cdb08f7f0b475be6af2991bbfee291563e0526dd25e0af293aab04f70afb7
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'. This URL is known to host malicious content, and the ML classifier also flagged the PDF with high confidence. The embedded artifacts and document body suggest it's intended to lure the user, possibly through a phishing pretext, to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/aws?utm_term=arti+simbol+flowchart+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/juvosi/40963637414.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e15a79db-cc8d-48a5-9f84-cc90a4065577/xipedusalat.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/vopulowigigag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c612aa54-da72-470d-94f8-db618e4d79ba/41473838393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38d74e2b-ff84-43bf-94f2-0bfbc2eca76d/access_my_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/calaveras_literarias_cortas_para_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/custom_spinner_adapter_android_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0842d642-1a6f-4bf8-b1d8-ec384fb751b8/96699236272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8118b078-2f68-4e1f-aa0b-91670e14cb88/gonusizut.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/54257901556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d65a1cd3-d8c1-4282-b97b-8b04fabf269d/37611601532.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59945918-a411-4239-8b1f-534f64faab44/my_hero_academia_episode_52.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/bawaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25c43a40-3e84-4a24-99d5-f4a989032761/35550654411.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17ab2840-2c87-4669-9751-9f0f91b1f79a/3117650412.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6902d27-b255-4152-9dae-182407cb0b97/30403330486.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_off0000ce56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE56 5616 bytes
SHA-256: 9c34ca054253ff943487d247770cd5e3b3a16e286538a0b18c43c6a60e15d70d
font_01_sfnt_off0000e155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE155 10064 bytes
SHA-256: ed1102a22e1370ad38fa7384f4c3a0e71e15677fd0b10120675e4819738fab48

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