Malicious PDF — malware analysis report

Static analysis result for SHA-256 8264c13843e1e448…

MALICIOUS

PDF

51.2 KB Created: 2020-08-24 19:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 95d2c8b8903b1bec9874f3dd0d59628b SHA-1: a0643079ff607cae30cd86cbcc69c599e7dab7be SHA-256: 8264c13843e1e448f45b6d2e7c7d4519cc5108e10311babaedef6073587e8b11
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to a redirector infrastructure. The primary redirector URL is https://ttraff.ru/pify?keyword=fireworks+first+aid+kit+piano+sheet+music, which is known to host malicious content. The document body, though heavily obfuscated, contains this URL and other links to Shopify-hosted PDFs, suggesting a phishing or scam attempt disguised as a free download. The ML classifier also strongly indicated maliciousness.

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=fireworks+first+aid+kit+piano+sheet+music In PDF document text
    • http://mumiko.justicecollaborativeatcornell.com/uploads/1/3/2/7/132740836/romososo.pdfIn PDF document text
    • http://judojaz.nicole-phillips.com/uploads/1/3/1/4/131437626/d79fcdf54f.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/1/0440/3727/5813/files/5625047172.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2682/4863/files/28534666705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6381/1997/files/80755281354.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5308/7911/files/zezixamezaxivizosepop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8649/5396/files/lepelefabikakitivuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8792/9252/files/bojipisemotudomutet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6294/3127/files/44325038675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8609/3214/files/77410313959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5039/2984/files/ctet_marksheet_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6754/7554/files/jedasapovon.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7502 5472 bytes
SHA-256: 6d0a161c061ced9dded2678e0cae6832ae141f5529bf17157f2f3c49775de40b
font_01_sfnt_off00008787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8787 10272 bytes
SHA-256: e76df3973716b299d0be1ec1f381231c566e38d9715ba3f61ea966540326276e
font_02_sfnt_off0000aaea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAEA 16100 bytes
SHA-256: b59afbb2f683942213df284fd86cd9422ada0c5f1ffac7698db8c94a40390bc4

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