Malicious PDF — malware analysis report

Static analysis result for SHA-256 895026d181ead88c…

MALICIOUS

PDF

35.9 KB Created: 2020-08-14 01:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d1c1928f9d007a6ad58498149eb05681 SHA-1: d764fa5446409a8e9537568edec0c02c37cd94ea SHA-256: 895026d181ead88c18d12453eed866af9887e997a4df19a71dd2be156cf4dd80
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to SEO-optimized PDF hosting sites, and one critical link to a known malicious redirector. The document body text, though garbled, contains keywords like 'moonlight sonata sheet music free pdf' and a URL that matches the redirector, suggesting a lure for users seeking free sheet music. The ML classifier strongly indicates maliciousness, and the overall structure points to a link farm used 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.ru/pify?keyword=moonlight+sonata+sheet+music+free+pdf In PDF document text
    • http://files.owlcat.org/uploads/1/3/1/4/131483955/jakeli_nasosom_zofebadizubopu_lulakap.pdfIn PDF document text
    • http://files.missionlenders.net/uploads/1/3/0/8/130874511/2441119.pdfIn PDF document text
    • http://rogeloz.weatherfromwoodlawn.com/uploads/1/3/1/6/131637136/ravubumobebo_dojogig_gorafekigin.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/1/0437/3712/0933/files/rinesitupiwobej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/32935333389.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/rirodabobukeju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7035/6632/files/95276018726.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7614/0710/files/ticketmaster_celine_dion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5881/3333/files/razones_trigonometricas_de_angulos_complementarios_ejercicios_resueltos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1230/7618/files/coldplay_fix_you_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/napirurodulurofimatosevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3806/4296/files/wowhead_old_rusty_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8044/1238/files/fajojivuromowezux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1269/1867/files/pazanovurebirexev.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_off00004b83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B83 5572 bytes
SHA-256: 60c0c2f159541cda1e722eaf1859488e43edb0762603083d3c0c590c4dd93550
font_01_sfnt_off00005e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E56 10132 bytes
SHA-256: 947e2c6d75ba34bca5f55d5b524378727c7ee068061f4adde8a92ba265e60a6f

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