Malicious PDF — malware analysis report

Static analysis result for SHA-256 239a45fcfa0e4974…

MALICIOUS

PDF

41.6 KB Created: 2020-08-21 22:32:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a89123602e9f804861ba977f0ab9f93e SHA-1: 38681cf5e1d9c6c890b1912b7ac02824e408c596 SHA-256: 239a45fcfa0e4974f1fd92eebd67e2fd1372da7ebea41056ea062b0b2b4d1af9
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains a malicious redirector link disguised as a datasheet download, which is a common social engineering tactic to trick users into installing malicious browser extensions or updates. The ML classifier and heuristics strongly indicate malicious intent, and the embedded URLs point to suspicious redirector infrastructure. The document body, though heavily obfuscated, contains the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=bluetooth+module+datasheet In PDF document text
    • http://kubaw.justkeephoping.com/uploads/1/3/2/6/132695550/jolezugaxope_mewukatiwiko_gokudak.pdfIn PDF document text
    • http://files.clydeaspevig.com/uploads/1/3/1/1/131164456/d86910b256bc.pdfIn PDF document text
    • http://files.caitlinejonesauthor.com/uploads/1/3/1/4/131453494/pipibu-netotojaro.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/1/0428/9835/8432/files/44240048578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3497/6149/files/wotetijabaruveza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3938/1912/files/definition_of_commencement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9934/8389/files/5_stages_of_grief_handout.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0447/2992/files/bedingungsstze_franzsisch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2426/1026/files/91590341965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9811/2167/files/93722337343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/qradar_vulnerability_manager_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2178/4472/files/avatar_korra_episode_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6073/1808/files/functional_skills_english_level_2.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 3

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_off000061e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E4 5020 bytes
SHA-256: cb63a1747b1ff70b5b72c6725ce89bc3bd1423df2f9239b338f7694071479862
font_01_sfnt_off000072d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D2 12468 bytes
SHA-256: 07fdfadf807520496bea67ce2db14fa3d5819753b27327f173f3014660d5c713

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