Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c4d19c99ec59e40…

MALICIOUS

PDF

36.5 KB Created: 2020-08-19 06:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c99c0a2eec2cbcc643a6d452721afba1 SHA-1: 422427240d5c871a13a034bbfd5f323f662ef728 SHA-256: 7c4d19c99ec59e403f8be69a374490f15496da7978fa7b95a0cdd122de0a9491
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to create an SEO link farm, with a primary malicious redirector URL. The document body, though heavily obfuscated, contains the malicious URL, indicating an attempt to trick users into visiting a potentially harmful site. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=lacrimosa+piano+sheet+music+easy In PDF document text
    • http://files.sewsweetdesigns.net/uploads/1/3/2/7/132712266/labelax-dusak-powosoruvamik-lumuxerutenufi.pdfIn PDF document text
    • http://fezepudas.katiecoon.com/uploads/1/3/0/7/130775934/zanesigoz-gakal.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/1/0430/5652/9565/files/english_word_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6704/0154/files/henry_and_ribsy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8982/1847/files/rizibajemomulanuzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31968244380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/mathematical_logical_reasoning_questions_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1338/1028/files/darelilujazadewatobuneku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4977/0399/files/beretta_tomcat_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9787/3831/files/math_for_grade_1_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4445/4051/files/6_puntos_del_acuerdo_de_paz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1551/9912/files/architectural_plan_symbols.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/classroom_management_techniques_jim_scrivener.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/telisupuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1356/0727/files/zuvozakidixanelabenevi.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 2

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_off0000522e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x522E 5184 bytes
SHA-256: 64d6bbd48a4b06e3532900b98d7b52db6d8cb9a08ef82c1bbc57c1c7c874d480
font_01_sfnt_off000063af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63AF 9884 bytes
SHA-256: 396520c89abe48e128cac2cc77b8e06007b0c1f2fb563315df9977d4fe643874

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