Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c26643cb7b0fbe7…

MALICIOUS

PDF

44.0 KB Created: 2020-10-29 16:18:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 572ac3357166c46545b21c5933fd574e SHA-1: 1a37749cfd840ff201abe152a7b31cca1ef9e3fd SHA-256: 8c26643cb7b0fbe7771ae091e6d73dccf017415a1dc69ff9aa26a8ed77966317
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, including a primary link to a known malicious redirector. The document body, though obfuscated, contains the text "Pathfinder tinker guide" and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous other PDF links indicates a link farm or SEO poisoning attempt.

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://ggtraff.ru/aws?keyword=pathfinder+tinker+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405639/normal_5f96e15b73164.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f9216f0217af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404964/normal_5f98042a79a10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421217/normal_5f99ec82854ba.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/1/0266/7829/6759/files/baudelaire_flowers_of_evil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc415af5-3772-4489-aa70-e5032e1c8929/max_dancing_with_the_stars.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3175/5932/files/49175384366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23a8fe7d-9de3-4dbf-a923-96535b01816b/28940007496.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/belt_conveyor_rollers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90605f8a-28b2-4e1b-b6e5-e3c2e3a3f237/slope_intercept_form_problems_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/48960836293.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/wamademovasanegesogame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3fff0c7-6f42-46e9-8200-fe6bd267c393/64107974320.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_off00006d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D37 5024 bytes
SHA-256: 1f704ceba9beba938cff169092283fd4a3b210ff3ecd6a084182628c81243f38
font_01_sfnt_off00007e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4C 11328 bytes
SHA-256: f4c6891aaf43ab18dcdf7de9174e57c8c035bd3d24a589f433b48e354c1a1c02

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