Malicious PDF — malware analysis report

Static analysis result for SHA-256 7735d231fc837c99…

MALICIOUS

PDF

51.2 KB Created: 2020-08-10 23:14:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ebfd7da8d29dc5fea6d4503c9631714a SHA-1: d8f8134beead6e3365e39fbf7462dc7d7216ecd3 SHA-256: 7735d231fc837c99fb101eb32a8d92101edd184d38a296e55c01bf219065bb5d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of links to external PDFs, many of which are hosted on Shopify and appear to be part of a link farm. The primary redirector URL, https://ttraff.ru/pify?keyword=definicion+de+aprendizaje+segun+varios+autores+pdf, is flagged as malicious. This suggests the document is designed to drive traffic to malicious infrastructure, likely for phishing or malware distribution, rather than providing legitimate content.

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=definicion+de+aprendizaje+segun+varios+autores+pdf In PDF document text
    • http://files.aphpersonaltraining.co.uk/uploads/1/3/1/3/131398477/91fc5934653c61.pdfIn PDF document text
    • http://files.kcorneliusimagesandmarketing.com/uploads/1/3/2/6/132681767/mudatirafilexe_jumeg.pdfIn PDF document text
    • http://files.mdvcorp.com/uploads/1/3/1/4/131406714/7134027.pdfIn PDF document text
    • http://files.ifacsta.org/uploads/1/3/0/8/130813972/setafos.pdfIn PDF document text
    • http://ximoluj.jeffcoltenback.com/uploads/1/3/1/8/131871721/kaguwepatus.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/1/0436/1161/9491/files/wugixupatidosefuzopox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/6753692296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4693/5451/files/2019626445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0965/4434/files/20525636676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7605/9290/files/puvat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5261/1222/files/widipuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/powevaligerodirikep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/fafajixemegugabox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3976/0295/files/militarum_tempestus.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_off00008666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8666 5476 bytes
SHA-256: 7b22986848e20b4395cf09314815f4d050927e9579226c18849a8b9a3f6e8b7a
font_01_sfnt_off0000992c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x992C 11080 bytes
SHA-256: fed94188a141ac709e7fd53bfdc91480b25488ac838307618fe52efc4eb90f43

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