Malicious PDF — malware analysis report

Static analysis result for SHA-256 86541bc5acb03a68…

MALICIOUS

PDF

44.0 KB Created: 2020-10-29 06:46:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ff70c923e3411105a9499d7b04a471ff SHA-1: d599b5530c3003e7b127cd1884e6aaecc0ca995a SHA-256: 86541bc5acb03a68fe89679fbfb0ad66e21395acfeee5952c6737907db676858
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, also contains URLs that appear to be part of a link farm. The primary function of this file appears to be directing users to malicious or SEO-manipulated websites.

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://gettraff.ru/strik?keyword=purple+color+prom+dress In PDF document text
    • https://gawugabel.weebly.com/uploads/1/3/4/3/134361726/kateliratajedus.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/44a5ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384483/normal_5f8e9a6c558fd.pdfIn PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/8bdae5433.pdfIn PDF document text
    • https://gaxopekel.weebly.com/uploads/1/3/0/9/130969853/nisivum.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/wimivebe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f8707a196d33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372673/normal_5f89dbc153227.pdfIn PDF document text
    • https://wimiberurazem.weebly.com/uploads/1/3/4/3/134351881/zijitebe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/date_a_live_encore_light_novel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90bb6663-8b0d-414f-baad-18425f961c77/wewonade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16556122-b558-4973-844f-f11057fd6351/diweli.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/29947754384.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/makopegigilivibuvilagij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2951/8746/files/thermodynamics_enthalpy_of_reaction_and_hesss_law.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/the_cask_of_amontillado_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3558/1342/files/igcse_ict_excel_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9929/4363/files/rejevisalewuzatevu.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/mosbys_review_for_the_pharmacy_technician_certification_examination_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5e1fa48-fbbc-4323-9cc1-d3940807a4d8/31765945794.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_off00006e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7A 5008 bytes
SHA-256: 50f664af3b019249ffc15156f3624da02082aeea9b9bd31865d46060df90237e
font_01_sfnt_off00007f6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6C 10376 bytes
SHA-256: a9d473854b0415bb7aeb7716ec1184e119d0dc5dc3d386961c72fe9f44134e31

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