Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fddd9af2c68e102…

MALICIOUS

PDF

52.8 KB Created: 2020-08-06 22:27:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 110a9e3d281ef7c575c3a8148aed7d0f SHA-1: 2c092f90850986a2331394c9a9535c875bb40e75 SHA-256: 5fddd9af2c68e102ae039c3721c23f1832df9d976ca8ad9c794be8b3fae88bc8
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, masquerading as sheet music downloads, which ultimately redirect to a malicious URL. This SEO-based link farm tactic is commonly used for phishing or distributing further malware. The ML classifier strongly indicated maliciousness, and the embedded URLs confirm a redirection to a known malicious domain.

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=partituras+de+aguinaldos+venezolanos+pdf In PDF document text
    • http://zuran.hgfoundation.com.au/uploads/1/3/1/6/131606060/vifewajuworaw.pdfIn PDF document text
    • http://files.shift-counselling.com/uploads/1/3/1/4/131437319/tulojume_parivivera_domun.pdfIn PDF document text
    • http://files.relaxingcottages.com/uploads/1/3/1/3/131398164/zuwejas.pdfIn PDF document text
    • http://files.frocksunderground.com/uploads/1/3/1/3/131384286/foxurosewiju.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/1/0432/6916/1110/files/jurnal_tentang_alkali_tanah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/53137525316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xumilegimazuguvabunozanik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4460/8932/files/metofovuvatide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8099/0366/files/35646193689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1046/3643/files/5409399778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9645/7884/files/16049031626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1624/0807/files/wrong_side_of_heaven_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/novuguvozixiropunab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3123/0624/files/craftsman_917_mower.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5624/2581/files/vumupukitogufepurofewukul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7349/4430/files/comment_fusionner_des_fichiers_en_un_seul_fichier.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4647/7722/files/migubiruxabeleduzivotet.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 6

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_off000081ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81EC 5320 bytes
SHA-256: 922a9396278ef168a3948a28250567482bf0c26a3be49b8467c8984f67d7d6ea
font_01_sfnt_off00009426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9426 15688 bytes
SHA-256: b8a41dfbc8304c4e70884f4ce9e080913a9a190c65b17c6797a851d0d9a46ecb

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