Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ccab10350f67ed8…

MALICIOUS

PDF

79.4 KB Created: 2020-12-07 18:34:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 93f95f2a77610c7eb4d040bde2f6c5e9 SHA-1: 1be2392391aecdb68be151f44caea458d9cb2657 SHA-256: 3ccab10350f67ed837f8eec692bfed9c506f301f0ff163aa3026800ac0a7f032
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF containing a malicious redirector link. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL, https://gettraff.ru/123?utm_term=%2525e2%252580%25259clos+agricultores+filipinos%2525e2%252580%25259d+%2528the+filipino+farmers%2529, is flagged as malicious and is the primary indicator of compromise. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/123?utm_term=%2525e2%252580%25259clos+agricultores+filipinos%2525e2%252580%25259d+%2528the+filipino+farmers%2529 In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc1343bd26ff1194f75a191/t/5fcc28b1662d5e24e092e463/1607215281893/58209890703.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2ba1840f1034a5cb4c0bb/t/5fc6aae85147b148041f48a8/1606855401081/bebawofelagirufesuj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffb332bbd740658015355/t/5fc6e7658f079636156ae14c/1606870885281/fruit_chopper_for_sale_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/146f174a-7621-49d0-8e4f-8a9569f9202e/72337140538.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a76cc66-5ab2-4d31-a9a0-1646b075bab6/pokemon_omega_ruby_cia_usa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc56e29bdb33045eee0a17c/t/5fc6029eeaf37e3b646ab25d/1606812318745/neferejuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e5fdcdb-9a55-405b-9c67-9f4f70fe4db7/9442056774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/791ddb9e-f670-4da8-b61c-4bf86962a505/nekawotuvovofunajoli.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc646132bbd7406582b26cc/t/5fcabbb6820cf678532dc52f/1607121848526/54794462512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f589204-61d4-454e-bac9-50683ab548f3/stalker_shadow_of_chernobyl_free_download_mega.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/toyota_avensis_2004_manual_ru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1119aede-ab3f-42d6-a565-7d7012ec27b0/13677007619.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_off0000f4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F9 5664 bytes
SHA-256: 53acc9adb6c6d471d831a3ec4ab6cb285186b98846be8f80cca9cbb911f918c0
font_01_sfnt_off00010826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10826 11112 bytes
SHA-256: 7dffda00a68ccd850bde92be00d65d9fdb21eb74868863cac49f6e0795334581

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