Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b12ba453a3464e9…

MALICIOUS

PDF

56.4 KB Created: 2020-08-16 19:14:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4e0dc964b7d805a21be93cdac79af544 SHA-1: 8b995d055ec511b9e557747c8fbee8e6df56fc31 SHA-256: 4b12ba453a3464e918d58e907f05149bc316335cafa93d912a2ccf93305ba40d
234 Risk Score

Malware Insights

MITRE ATT&CK
T1204.001 Malicious Link T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a popular anime song, aiming to trick users into clicking it. It also employs a social engineering lure, instructing the user to install a browser extension or update to view content, which is a common tactic for credential theft or malware installation. The document body, though heavily obfuscated, contains the malicious URL and numerous other PDF links, suggesting a link farm or redirection strategy.

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.com/pify?keyword=blue+bird+naruto+opening+song In PDF document text
    • http://banuse.tortugagraphix.com/uploads/1/3/1/0/131070450/kobigo.pdfIn PDF document text
    • http://ridab.balanceacu.com/uploads/1/3/0/9/130970009/4602098.pdfIn PDF document text
    • http://files.badgerridgeind.com/uploads/1/3/2/7/132740352/1229142.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8770/8825/files/bloomberg_businessweek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6219/7400/files/5912872240.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1793/4747/files/34140113392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4633/0791/files/54826455536.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3412/2139/files/android_developer_user_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/jafajelixafena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4927/8875/files/being_alive_company_sheet_music_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6905/4886/files/16388863235.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 1

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6002 16088 bytes
SHA-256: 4d6e8985abae6172cf5ea5d1417acd3abed58503071c696d42ab7af14da8c21a
font_01_sfnt_off0000935c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x935C 5196 bytes
SHA-256: d4654ef97e28c5a39a3565f129ce7daf5fb8892941eb14bdb37ce68cd28b05e2
font_02_sfnt_off0000a507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA507 9752 bytes
SHA-256: 813dc4c2728c5f5101cbaabd44321300faea694cdab16951ea6710c3e21e2c11
font_03_sfnt_off0000c674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC674 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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