Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f301e142e76ede9…

MALICIOUS

PDF

85.9 KB Created: 2020-11-07 06:48:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cd469cfd07f5c33b1a3bc84386ea6ba5 SHA-1: 182ac153d770be724ef35ac08c49bd3c1c416369 SHA-256: 1f301e142e76ede90b3fbd45e2ab9dc1a29c1b2cab15eecfa31ef51a71f0592c
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains a large number of embedded external links, indicating a potential link farm or SEO manipulation tactic. One of the primary links directs to 'trafffi.ru', which is suspicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?keyword=fruits+basket+season+2+dubbed+crunchyroll PDF link annotation
    • https://pewoxunoxosizix.weebly.com/uploads/1/3/4/3/134318290/5ad7b3722f.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/3103871.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386830/normal_5f9d4da54c667.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://sanizip.files.wordpress.com/2020/11/classical_myth_powell_8th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf0dc9bb-9556-435d-957e-bc183e40e74a/tajofolitaleruniv.pdfIn PDF document text
    • https://zerujad.files.wordpress.com/2020/11/delumoves.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bff1ba42-cc95-41ae-83db-6063026d8c74/zaxavunenipijowulig.pdfIn PDF document text
    • https://s3.amazonaws.com/sodoxi/hereditary_traits_list.pdfIn PDF document text
    • https://rezabaxew.files.wordpress.com/2020/11/rotomikegepuwejerarujo.pdfIn PDF document text
    • https://ligesopalod.files.wordpress.com/2020/11/97165985243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfc3076f-49d6-4aa9-ae8c-caea9dce3da7/return_of_the_living_dead_part_2_tarman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5f8a3e7-08b7-43eb-8085-68d28eab596a/walgreens_ear_thermometer_68-340_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF7 22472 bytes
SHA-256: e26ba9e789c76ce29b282af39b4dca957cfd4a89a5ce8f9e936e99b5d90e971d
font_01_sfnt_off0001129f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129F 5420 bytes
SHA-256: 73632e737615144df7d3c57d7feef4cb65f0905ea905b9cdf33174abb28e8f3b
font_02_sfnt_off00012511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12511 11032 bytes
SHA-256: c63284b21474a2802664d97cad03a880ec94298c78aa9ab828564ae943d23c32

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