Malicious PDF — malware analysis report

Static analysis result for SHA-256 a380a59818c46e72…

MALICIOUS

PDF

34.0 KB Created: 2020-11-02 16:29:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 4ce8d2300d5b9470acbfb5a6639c681f SHA-1: 7a298e8811be5c2bf3a50743aa97fd5c0a20560f SHA-256: a380a59818c46e72e8f886e253576b2346debad320f152bb747ca777c87410d5
194 Risk Score

Malware Insights

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

The PDF document contains a lure related to resetting iCloud credentials, directly linking to a known malicious redirector. It also functions as a link farm, distributing numerous other PDF documents, indicating a sophisticated SEO poisoning or traffic generation scheme. The presence of embedded URLs and the ML classifier's high confidence score support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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=how+do+i+reset+my+icloud+email+and+password In PDF document text
    • https://bikinolij.weebly.com/uploads/1/3/4/5/134514604/kasexinoviv_jazatef_kojuzozazexin.pdfIn PDF document text
    • https://xabisemegebo.weebly.com/uploads/1/3/4/4/134491474/8833924.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/5338250.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/1/0503/1074/2212/files/30012982824.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/41837712795.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03ba667c-3c88-494e-978d-8f3a225641c1/paul_crouch_jr._2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85dc3890-b74e-4e03-8986-dd69395066ad/vuzodozazakifuxovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7981/0206/files/worksheet_transformations_of_quadratic_functions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/1589/3677/files/kapalama_satellite_city_hall.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_off00004808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4808 5376 bytes
SHA-256: ff21475d40f375dfb02c5b473e77443553115f672f94504bab7c5040e9b6bbf9
font_01_sfnt_off00005a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A4B 9692 bytes
SHA-256: 6f84bc3ce154d68e15a86626b2fb35bf04b090e6b9476506a886c569a89fc0a2

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