Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c819484004695cc…

MALICIOUS

PDF

47.4 KB Created: 2020-08-07 17:22:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 10c68215b115d255d310051bde6088f4 SHA-1: b71aac074a5afd937b49590323bca7f90c630a84 SHA-256: 5c819484004695ccd55fcd3bfe031ba9fbd43ab97eaf7817f244499137744b7c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links designed to redirect users to a link farm, ultimately leading to malicious infrastructure. The ML classifier strongly indicated maliciousness, and heuristics identified the document as a redirector and part of an SEO link farm. The primary malicious URL identified is https://ttraff.ru/wb?keyword=architectural%20record%20june%202018%20pdf.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.ru/wb?keyword=architectural%20record%20june%202018%20pdf In PDF document text
    • http://files.ittstrading.com/uploads/1/3/2/7/132710669/a06128948c733ac.pdfIn PDF document text
    • http://files.moremilestogo.com/uploads/1/3/1/0/131071063/kurotovovisonevaneb.pdfIn PDF document text
    • http://files.qicultivation.com/uploads/1/3/0/7/130776542/toxapujuzef-zajidupodasadel-pujenu.pdfIn PDF document text
    • http://files.jeffchandlercreative.com/uploads/1/3/0/9/130969151/5679027.pdfIn PDF document text
    • http://files.serialmachines.com/uploads/1/3/0/8/130874370/savudapoter-bexozijagijowa.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/1/0438/3539/2150/files/fuvulufinenob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0976/8604/files/anthropological_linguistics_an_introduction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/sovubuliniso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/css_z-_index.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8077/7882/files/65566540319.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/janedetoguwem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4731/2789/files/73867795177.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4686/0957/files/71182866439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2803/8310/files/statistical_methods_for_categorical_data_analysis_2nd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4337/2699/files/cantigas_de_roda_letras.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44240048578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0820/4708/files/40913735442.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_off00007924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7924 5648 bytes
SHA-256: 6666f2f694d8d4473a978d6821e1bdef1a44324ff02fa6564eb8445a0b21d7fe
font_01_sfnt_off00008c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C64 10740 bytes
SHA-256: 39853e3187a3f17819fc2d9dac46f4ff5bb96b5800e68bfd2786cc111eefd486

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