Malicious PDF — malware analysis report

Static analysis result for SHA-256 a21a87e407e4139d…

MALICIOUS

PDF

48.9 KB Created: 2020-08-04 03:47:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ccf58732dc4fe7bb2d89f8162e28e96c SHA-1: 9e89e90423323fcaa12b7561570a2d3bba25c154 SHA-256: a21a87e407e4139d3c02bf77350fc8be65bd8ebc17175a8757be1308b5bc7cce
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, including a redirector at 'ttraff.cc', suggesting a phishing or redirection attempt. The document body, though partially corrupted, contains keywords related to health, likely a lure. The ML classifier strongly indicates maliciousness, and the presence of a link farm further supports a malicious intent to drive traffic to potentially harmful sites.

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.cc/pify?keyword=alimentos+para+diabeticos+e+hipertensos+pdf In PDF document text
    • http://files.perfecthanginggallery.com/uploads/1/3/1/8/131858592/gipasit.pdfIn PDF document text
    • http://files.newsalembaptistky.com/uploads/1/3/2/6/132681698/pigotusu-lewutedibe.pdfIn PDF document text
    • http://files.greenkeyconcreteforms.com/uploads/1/3/0/7/130775084/67a28513.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/1/0434/8064/5782/files/34139377257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7379/8298/files/72043826013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2452/3169/files/vuxabefalumezalidosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/6480593021.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2304/6555/files/99266794158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7988/4186/files/furniture_design_software.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rinajimakonewob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4804/9572/files/dell_latitude_e6440_drivers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9330/3204/files/fawus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/gugijogenogupafiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1987/7026/files/86878144488.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6878/3782/files/petelesofi.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 4

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_off00007097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7097 5312 bytes
SHA-256: 8d59de6ad2948039d068499f74aeeed14d330342982a2d303105cb019158ae46
font_01_sfnt_off00008267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8267 11216 bytes
SHA-256: 67c67cac519402362fa491de2b5238e87bbfe787f4da9c9fb3f4bb33c2f8dede
font_02_sfnt_off0000a6d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6D2 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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