Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d4dc7f1384bbe63…

MALICIOUS

PDF

40.7 KB Created: 2020-10-31 08:53:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 183e53c2e00e3662873d497c226c778c SHA-1: e44ee61af0aec06e46d50b9456090547ceac6a5b SHA-256: 2d4dc7f1384bbe635354a61c83f87ee8214b8c3829ee74b98fd6740e1fc60cea
94 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 infrastructure, which is designed to lead users to harmful websites. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to trick the user into clicking it. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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/strik?keyword=huntington+library+memorial+day In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369916/normal_5f936e5530d5a.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/kijejelakenat-gewigopaparax-luledod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426572/normal_5f9b030829b0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370989/normal_5f8c0d9082f26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376610/normal_5f91c57f6fb2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421350/normal_5f994f31df051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371005/normal_5f966d52bdd4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f87e10eb480d.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/1/0428/9101/8396/files/delf_b2_production_orale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0662/3384/files/baylor_law_school_numbers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2129/2952/files/25752114296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ed51507-6c81-467b-9818-aae2d1b1df67/1651242957.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8960/6838/files/xejoforutugenivesulotugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/297ea9d7-763f-48d5-a3d1-4465bfafdbcc/17458400020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8423/2886/files/gajomazikisada.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_off0000618d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618D 5172 bytes
SHA-256: 5c0675c8e5466f6aeae23977a2fa48bc669768f2f9ce0819dfdecefde2ba632b
font_01_sfnt_off00007312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7312 10104 bytes
SHA-256: a3fe7f86a9952c97d4800fa22a3bea19eac2f7ac4cc068ddddd679d5f8bb71f4

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