Malicious PDF — malware analysis report

Static analysis result for SHA-256 624d7efaaadf8b6a…

MALICIOUS

PDF

34.1 KB Created: 2020-08-04 08:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bead6fee2701c342414c14c4124b07cd SHA-1: 900ae8e462a94c9ccc39ab1b2754a2ec79d77a73 SHA-256: 624d7efaaadf8b6a54994ab3bab9d407da3f2aa6298ecccbf1834cbbf5f0d4e9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to redirectors and SEO link farms, designed to trick users into downloading further content. The primary redirector URL, 'https://ttraff.cc/pify?keyword=britain+for+learners+of+english+workbook+pdf+descargar', suggests a lure related to educational materials. The ML classifier strongly indicates malicious intent, likely for phishing or malware distribution.

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=britain+for+learners+of+english+workbook+pdf+descargar In PDF document text
    • http://xofikal.green-runners.com/uploads/1/3/2/6/132695663/nipuxejekajis_tadezijavabu_kawegisuresib.pdfIn PDF document text
    • http://files.fremdfeedergirls.com/uploads/1/3/0/8/130874278/7007527.pdfIn PDF document text
    • http://files.davidfrankdesigns.com/uploads/1/3/1/1/131164187/dizavuxiwibedisufe.pdfIn PDF document text
    • http://nizaxa.berkshireheroes.org/uploads/1/3/2/6/132683014/tadusevipugib.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/1/0434/7016/0032/files/58741255111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6581/8782/files/32106120542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0416/4257/files/famexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/87504674409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nubizasijimowedemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/dafodufirujavomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5067/2033/files/33593502465.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7727/1703/files/demoxogibup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5194/8963/files/99221437635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4834/5500/files/vevufuniluzuwana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zosakasebiribo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9726/8128/files/logub.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
🗂 Part of campaign: burkholdernutrition.com 5 samples

Related samples 3

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_off00004591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4591 5760 bytes
SHA-256: 79ccecbf1096e040291ed90daa2146666816627222d61f6fa6f378765d3c415c
font_01_sfnt_off00005937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5937 9972 bytes
SHA-256: 3125c3dd55de7ab8e9528b66186654eab24a10c776f61947847dbd446b108937

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