Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7fc70f6dfad51fe…

MALICIOUS

PDF

45.3 KB Created: 2020-11-01 07:49:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ddba8b13c3304b0925dc847061ca3a70 SHA-1: 2f2956b561dbcc4f168aebb9a74cd121b7812c15 SHA-256: c7fc70f6dfad51fe6cefbca28c84e2be55a14a76b3dbfdad5f6c7849af9023b8
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.me/123?keyword=canvas+wright+career+college In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367921/normal_5f8ff9c94cfe1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383149/normal_5f8bbe28ca35b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373241/normal_5f9e3fe294b83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_5f88369f790f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402956/normal_5f91f0ec1e709.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413454/normal_5f996780e36a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408319/normal_5f93c2904f9eb.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/da84417c-16a4-43da-b682-588e851e7cb3/27216914617.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4188/8158/files/zokugib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6ce350c-8d11-45b6-80c5-31d6de589b11/ratio_of_similarity_area.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61472980-abf4-43fc-9f1d-ec66ac43c14b/2852945066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/0933/2160/files/71782661410.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfe24084-4a4a-4534-a449-c607db849717/catch_me_kitty_reviews.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_off000070ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70AD 5120 bytes
SHA-256: 19cfb762ff5558a15c1f4485551324e65a77da32f255b3ae58b680db99bd02da
font_01_sfnt_off00008226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8226 11188 bytes
SHA-256: 282ef98e8f41a8abaa36759f56e784db5c6fe86249bee20ce8ee83520ca3bb24

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