Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bbeeff916499d8d…

MALICIOUS

PDF

87.5 KB Created: 2020-10-03 18:16:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 7e997229aa1b9a46319637170fa55be5 SHA-1: 7ed5a9ef0d1be47f8b98accdfafcfe6f177a82bb SHA-256: 3bbeeff916499d8ded2f6d993f1392b3efecd3e1039288fca2d3fd6778cb7ae9
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body and embedded links suggest an attempt to drive traffic to malicious sites, potentially for SEO spam or phishing purposes. The ML classifier strongly indicated maliciousness, supporting this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/strik?keyword=all+cg+dj+songs+free In PDF document text
    • http://files.harveyjettmusic.com/uploads/1/3/1/4/131453053/b649b.pdfIn PDF document text
    • http://files.praisedancernigerians.com/uploads/1/3/0/9/130969801/wuselesowawev-roxunajudo.pdfIn PDF document text
    • http://pagipefug.ndhaquascapes.com/uploads/1/3/0/8/130873995/duwodopejibaxu_lofofel_wetuvuladogu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6346/0508/files/planes_de_accion_para_una_empresa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2897/4237/files/que_es_iap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0310/0832/files/google_slides_size_pixels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d42b1545-b981-4efc-9c2a-4f167e963696/solajarejize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83010f43-3822-46b8-8114-cf210524dd80/25238658565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eff5b6a7-c786-42cd-a18c-db7f54c41634/benatasibovotikabar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39a9c602-4252-41f6-bfa8-0cfc1337fc95/tutepikigepikimo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df519f62-387a-446e-9449-bf85413277fa/78381146545.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5740/0994/files/worthington_kilbourne_football_coach.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8367/7339/files/warrior_cat_herbs_list_and_uses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1390/5311/files/muzagikenawinupibixejej.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_off0001141b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141B 5044 bytes
SHA-256: 80abf675454212339994a7be3531f00a498fc964ec1ccd80d7f571e60f36fa95
font_01_sfnt_off00012560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12560 14052 bytes
SHA-256: 30d04dcf6b6c91e31e2fbfced57822abbdbc193614b54ea75615e22ff4e410f6

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