Malicious PDF — malware analysis report

Static analysis result for SHA-256 90724a3d92766922…

MALICIOUS

PDF

67.7 KB Created: 2020-11-23 03:30:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4ff863e08871f23ca1b15a226366be42 SHA-1: 021eed0a87aa156f75f3648e821280c1e0701583 SHA-256: 90724a3d92766922454963b896d26c10945e86d955b706510c33d2238a08693d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The embedded URL `https://gettraff.ru/123?utm_term=poetry+terms+worksheet` is flagged as malicious. While no scripts were explicitly extracted, the PDF structure and the malicious URL strongly suggest an attempt to trick the user into visiting a harmful site, likely for credential harvesting or further malware delivery.

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://gettraff.ru/123?utm_term=poetry+terms+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4451744/normal_5fa89613c4158.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423462/normal_5fae455871013.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369162/normal_5f891052ee214.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374839/normal_5f8b048369591.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393638/normal_5fbafe6d2c1e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427268/normal_5f9aaf2567129.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379233/normal_5f99423d93f58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366630/normal_5f9485098b9c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470839/normal_5fb5c629b6de7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379230/normal_5f8a4dbbac0f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485012/normal_5fa91511cca5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405459/normal_5f9a887db5335.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/2d7a2d95-639c-4368-bac3-165022006e57/13168861824.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25de3548-864a-4b5e-bfd5-05e74475ae94/67753636541.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_off0000ce5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5A 4940 bytes
SHA-256: 141986d2e887d7426b9023fe51b4c182e74c7aea41752d7f79131691e84dec4f
font_01_sfnt_off0000df14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF14 10524 bytes
SHA-256: 96cf1fee57e2696708f514588523ed266bab8021398c15551548f4e4421f16cf

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