Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5d24b78c4071466…

MALICIOUS

PDF

59.8 KB Created: 2020-08-14 07:18:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b9137e95426d435ca240e1d22c7440b6 SHA-1: c5c26da126707fc5b15bbe3613e159d49af74b85 SHA-256: b5d24b78c4071466f26e616fdcbfe53a5fefff952e84271a311ee6481743e34e
194 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic to distribute malicious content. The primary malicious URL is https://ttraff.cc/pify?keyword=performing+tracheostomy+care+ati, which is likely used to redirect users to a further stage of the attack. The document body, though heavily obfuscated, contains this malicious URL.

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=performing+tracheostomy+care+ati In PDF document text
    • http://jodorebe.indysuzukiacademy.org/uploads/1/3/2/8/132814930/35017.pdfIn PDF document text
    • http://files.hennafyme.com/uploads/1/3/2/3/132303230/0602b06454.pdfIn PDF document text
    • http://files.stpaulsenola.com/uploads/1/3/0/7/130739155/rojafexusam.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/1/0450/1143/5670/files/treinamento_de_assertividade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7144/6939/files/zinijubefewiwudov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/43778875991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7737/8972/files/xipofajofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9195/1769/files/zesol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4884/3929/files/57722449644.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8099/1388/files/todexufisedojotijejezaxir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7222/3387/files/cancionero_infantiles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42820491308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5026/1911/files/lugiporonidukosoxid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/duwidomasugubelufatabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2571/0750/files/cambridge_o_level_maths_notes.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA430 5364 bytes
SHA-256: b51a5356b5b9c778875b80f0b0ebfef72b770e0b3fdbfe1e3289abe472da25a7
font_01_sfnt_off0000b648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB648 14204 bytes
SHA-256: c4d300e9195004aa67e44c1aa4588eee1624c99470631ebd631d7526ed2865c9

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