Malicious PDF — malware analysis report

Static analysis result for SHA-256 100dbef15033872c…

MALICIOUS

PDF

63.8 KB Created: 2020-11-05 01:05:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ff81d747c3b37f4aea5ec9330dfa3fcb SHA-1: 2d555737031782531943409ffbc0bee196a0c4b3 SHA-256: 100dbef15033872c576bddcf1b66c3c74ae03209078d4455976cc7388febfc69
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, many pointing to link farms hosted on Weebly, designed to redirect users to malicious infrastructure. One prominent URL, 'https://ttraff.club/123?keyword=manchester+by+the+sea+movie+sad', is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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://ttraff.club/123?keyword=manchester+by+the+sea+movie+sad In PDF document text
    • https://bidutujube.weebly.com/uploads/1/3/4/4/134403342/jewom.pdfIn PDF document text
    • https://poxuxeket.weebly.com/uploads/1/3/3/9/133997588/6d0c390b46f90e.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/xofasaladuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370267/normal_5f8ff6a849efd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387817/normal_5f90c6d40b60b.pdfIn PDF document text
    • https://zufesuvagudinaf.weebly.com/uploads/1/3/4/3/134321689/pewuvigemawup.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/sokilijaw.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/624c95a1-90ec-4e0b-b2bf-ce5118cbab4a/error_code_0x80070003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cd1fa93-031d-44a3-92b9-75329fadd4ab/37269172512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed076c03-253f-4e6a-9d33-dbbfa91a2d3c/40378862218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d1b1836-5cf0-400a-9704-1ec1d653e9d5/5913896693.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b35099f-1e89-46eb-96ca-c08094e2cc81/tassajara_bread_book_sourdough_recipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1ca99c8-a8fa-490c-9904-a7ef6c219b89/40278320688.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74aa7d33-35fa-43a1-a4af-62c25b0acf5f/smoothie_king_application_near_me.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_off0000b7e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7E7 5456 bytes
SHA-256: c38b6cc829f86f503736f25c3116e4a80e6f56b73396a119e4f2fe3634b4ef5b
font_01_sfnt_off0000ca5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA5F 12296 bytes
SHA-256: 218f4084690a3eae7e21c8a99508fbf15f438c7758b419b2d9e08990904307e4

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