Malicious PDF — malware analysis report

Static analysis result for SHA-256 23b97406e21f2184…

MALICIOUS

PDF

44.8 KB Created: 2020-08-05 02:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f0ec0125adfffcd92c0a44eb889e5171 SHA-1: 39045994131cbba0634784bf34864f6ec3c1b7e4 SHA-256: 23b97406e21f2184bc80b83e16a67223cd43329d942f7f4a529c24a1536fbdca
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure at 'ttraff.ru'. The document body, though corrupted, contains text related to educational materials, suggesting a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports the malicious classification.

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=buku+teks+bahasa+arab+tahun+2+kssr+pdf In PDF document text
    • http://files.northcentralplanningcouncil.com/uploads/1/3/2/3/132302923/31851.pdfIn PDF document text
    • http://files.freedom-conspiracy.com/uploads/1/3/0/7/130740297/notoxegep.pdfIn PDF document text
    • http://files.shannonvallor.net/uploads/1/3/0/7/130775701/gufenu.pdfIn PDF document text
    • http://files.quiknfresh.com/uploads/1/3/1/4/131437174/vebukuse_surikubetonivuv_firij.pdfIn PDF document text
    • http://files.nbhaky03.com/uploads/1/3/1/4/131453036/70a7f5f6e3b6.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/1/0431/1734/6965/files/12659207276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3547/4590/files/zajewezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7514/1794/files/51027108163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9912/0033/files/rafosadozozukotiwaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7623/0046/files/guide_dogs_for_the_blind_oregon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5772/6118/files/dapix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/61437877939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/30861372633.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6041/8970/files/rusidejokito.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C12 5484 bytes
SHA-256: c9ad2f7db391cfe6d6c287af3775ccf397e58cfd6189b6c22f7f7091d07768cf
font_01_sfnt_off00006eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB6 10476 bytes
SHA-256: 8728ffa4db64851ebe0af89971a98c63fbc354b5bdcc6bf4070d211bdeaa5bf2
font_02_sfnt_off00009133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9133 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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