Malicious PDF — malware analysis report

Static analysis result for SHA-256 408bcf11db1c2b61…

MALICIOUS

PDF

45.2 KB Created: 2020-08-13 04:45:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4e58d6d757f465c60c526cb1b48b94a2 SHA-1: 4a48ccd29ec94b8d1a1c3bd4a5b2e3da26a5a3ac SHA-256: 408bcf11db1c2b6177114db6b9954cd437714162ae2efce8cb0593475c46783a
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically `https://ttraff.cc/pify?keyword=epilepsy+ketogenic+diet+pdf`. This URL is presented within the document body, disguised as a link to a PDF about the ketogenic diet for epilepsy. The file also contains a large number of embedded external links, many pointing to Shopify domains, which is indicative of a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document and redirection to a malicious site.

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=epilepsy+ketogenic+diet+pdf In PDF document text
    • http://suliburut.shoestotheworld.org/uploads/1/3/1/0/131070847/af08a67b257.pdfIn PDF document text
    • http://files.morganelwell.net/uploads/1/3/0/7/130776639/ropop_xitemaw.pdfIn PDF document text
    • http://files.volkerspatchcollection.com/uploads/1/3/2/7/132740564/9545952.pdfIn PDF document text
    • http://viwoju.godinsmission.com/uploads/1/3/1/4/131454526/nuwato.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/1/0431/6463/1195/files/oestrus_synchronization_in_cattle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3995/4856/files/administracion_de_la_cadena_de_suministro_chopra_4ta_edicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61066914906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3822/9158/files/nanopizipegimapinojikune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8456/2084/files/cause_and_effect_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3425/5270/files/javubonarufubino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1488/0405/files/ditizev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0780/1504/files/biology_textbook_class_11_maharashtra_board.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9586/8057/files/64056213928.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8910/0951/files/72195823297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3579/4340/files/seragejavupopubus.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 8

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_off0000730a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x730A 5140 bytes
SHA-256: 27596b0c4c99d1a8ae0dbdccf04453cc1c8a35330d7686a40f4830829a98d761
font_01_sfnt_off000084b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B0 10444 bytes
SHA-256: 5693b23efe620d3313c50edaa32790092f3fd483177358d0f6b6ca733a0498ba

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