Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eeb99761247dc2c…

MALICIOUS

PDF

40.4 KB Created: 2020-10-28 12:28:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 388122f3f5f2dd16b4bfad7929f5d805 SHA-1: e3663a2d6bebc4be975310c16a978e949f4405bc SHA-256: 9eeb99761247dc2cc492bf86af6589cb26b4a7d3370f2fb27614bfdf6565aa8d
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as a search result for public records. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URL suggest an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

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://ttraff.club/pify?keyword=kaufman+county+clerk+records In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379474/normal_5f922a266f09b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_5f87289196eb2.pdfIn PDF document text
    • https://povelelowu.weebly.com/uploads/1/3/4/3/134331265/sogim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f88f8a641e8d.pdfIn PDF document text
    • https://jawifimubagibe.weebly.com/uploads/1/3/4/3/134310986/dowejuvavana.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/wirokuwofubonoderax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f8a15519fe8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369317/normal_5f881042c0341.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/d7d12025-d3c1-4c15-ad34-2249bad0d80d/susoxolaxefuxovijipubusuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f145e1c4-36bf-4b74-87ac-a4075be90af1/93169107628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff4e037f-7d2e-405d-9035-bf1a5f5e59d1/1252053754.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/comparison_of_all_sorting_algorithms.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/gixilawupozexalabop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63262dde-6d15-4354-83c8-fce29eec9da4/54107122958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8803c25f-5555-4e7d-a9e2-8742465a707f/19101466337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/063aba49-e4a9-4dfc-85ec-cd5880ae75a1/29046879797.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/82616755514.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/list_of_irregular_plural_nouns.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/6th_grade_math_multiplication_worksheets.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_off00005d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D81 5304 bytes
SHA-256: ce5ecf464e4aee3f654f8fff88e7936d8c183aa7a3bd2ca9473a5bf0b7bc319f
font_01_sfnt_off00006f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F83 10972 bytes
SHA-256: 8ecb67736c8f2e042a96cd901362b36d81b87f58ddacca12482219b99b188d6b

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