Malicious PDF — malware analysis report

Static analysis result for SHA-256 8603250ca4935c2b…

MALICIOUS

PDF

34.5 KB Created: 2020-08-08 20:14:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fb7dc81cfd51352124dfb77e12545ca5 SHA-1: 2906ecd9e64b21d17312e5668aa4c4dab8ce0ddf SHA-256: 8603250ca4935c2b7d5a0523b5c39259dd7e4ade4ebb9dd7d577d006aed4e113
194 Risk Score

Malware Insights

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

This PDF file contains numerous links, many of which point to a redirector service (ttraff.ru) disguised as a free download lure for piano sheet music. The ML classifier and heuristics strongly indicate malicious intent, likely to redirect users to a phishing or malware distribution site. No scripts were extracted, but the embedded links are the primary attack vector.

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=blank+space+piano+sheet+music+free+pdf In PDF document text
    • http://files.douglasrowestudios.com/uploads/1/3/0/7/130739459/b2eaeffa50ad1.pdfIn PDF document text
    • http://files.gritiyacctv.com/uploads/1/3/0/9/130969298/nizufalunudedi.pdfIn PDF document text
    • http://files.reginaswatercolor.com/uploads/1/3/1/4/131453753/fajomelugawipugop.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/1/0432/6581/8789/files/fixajeduzutosejoxan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/2683250634.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8180/9566/files/zefebogisadenadalagomuvo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2738/1920/files/bezejifigejisunaxivu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0441/1556/files/pisedubasuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5014/7733/files/80392409811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8660/0609/files/gixefuvunomapikudegosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65233410578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6982/4407/files/d_d_stealth.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7473/8586/files/jokijekoruwex.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 4

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_off00004758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4758 5508 bytes
SHA-256: b6cb64dd553b1c7caac708e22d9f0a3ce44e75c6e1a96cae9913f99c34690e78
font_01_sfnt_off000059ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59ED 10288 bytes
SHA-256: 2f86831ce6ceb326c3782fd8705995042d12a3bf76dfb2c22a9a4d06f0e45570

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