Malicious PDF — malware analysis report

Static analysis result for SHA-256 e600975307995b25…

MALICIOUS

PDF

39.4 KB Created: 2020-11-07 01:18:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ff2f00d7d125189b14ae488579a2ee54 SHA-1: d4143e13078308e68743de19886938a382169593 SHA-256: e600975307995b25ab21faff6cbe43894b360dd3c8853a3b0c3c20ae06d84c37
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a significant number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or distribution mechanism. The primary URL, https://trafftec.ru/123?keyword=how+to+get+loud+car+speakers, is directly embedded and likely serves as a lure. While no scripts were explicitly extracted, the nature of PDF link farms often involves JavaScript for obfuscation or redirection, hence T1059.007 is included as a potential technique. The overall pattern suggests an attempt to direct users to malicious or deceptive content, fitting the Spearphishing Attachment initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://trafftec.ru/123?keyword=how+to+get+loud+car+speakers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401714/normal_5f935a5eccae2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385206/normal_5f9eebc68e212.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421460/normal_5f99e6b3c570a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404966/normal_5f938691e088c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/learning_management_system_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3759f019-b3e0-4b0e-be7e-498607fb056a/koxenobadewi.pdfIn PDF document text
    • https://zepegegudo.files.wordpress.com/2020/11/cryptocurrency_for_dummies_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/352628d9-af12-4111-9a52-789c7ee2e13d/jikujavixemepajuvutaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4272eff6-b73e-48ad-be16-a06b1d996919/why_he_disappeared_ebook.pdfIn PDF document text
    • https://zatejoru847961968.files.wordpress.com/2020/11/72489844693.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ef4f96d-acb5-4118-add4-4a283a791fc8/56190979042.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C2D 5360 bytes
SHA-256: c970cabab358cb231ff3a408eef6374d0063451ecf750ee89a635885410f3772
font_01_sfnt_off00006e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8D 10156 bytes
SHA-256: ff03890435813ef203201229ab5a5339a687f8afd427d355d072d5129e3bc4cd

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