Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8e51e13a8171e98…

MALICIOUS

PDF

45.2 KB Created: 2020-09-11 02:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d1bc0f52092f6f017399e98673a2a997 SHA-1: db5950bd6d277f3c73d2685e542a76070c69d1ee SHA-256: b8e51e13a8171e987b57297b4d7ac8f4c8ffa4824913740b100b2036a83292f5
194 Risk Score

Malware Insights

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

This PDF document contains numerous links, many of which point to a redirector service that ultimately leads to malicious infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/pify?keyword=better+call+saul+s4+episode+guide', which is identified as a malicious redirector. The presence of a large number of external PDF links suggests an attempt to create a link farm or distribute malicious 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.link/pify?keyword=better+call+saul+s4+episode+guide In PDF document text
    • http://files.ryderstudios.com/uploads/1/3/0/8/130873826/6680bffb6841.pdfIn PDF document text
    • http://boveder.cbmcofmadison.org/uploads/1/3/1/6/131637027/7449492.pdfIn PDF document text
    • http://files.alisonrothman.com/uploads/1/3/1/6/131636852/5aa8e188f32e2.pdfIn PDF document text
    • http://files.differenttranslation.com/uploads/1/3/0/7/130775659/dekamug.pdfIn PDF document text
    • http://xidik.wheatgrasspublishing.com/uploads/1/3/2/6/132680981/e547940.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/1/0431/7931/1253/files/aston_martin_db11_performance_specs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2769/2695/files/41281329201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/suxibanov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/kewugigumepis.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/64bd79_fd088661277b4b84bd1c1725d8e23dfb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8ba634_8008f6d92f26468fa877200ee00973a9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e4a001_66cc0042ab004ddfbe052b70ecf52ea3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8c5bc8_1fedb313352c4b879874338831afad52.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/735424_18c28a6fa07140dab07059dfc758c7f1.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_off00007303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7303 5376 bytes
SHA-256: 51d1e113aee416a934f441829aeda252014a7c9be8fd46b1866986daa74bf618
font_01_sfnt_off00008562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8562 9968 bytes
SHA-256: 630c0724368bfc6e38fbb85a559179f4be75143ca5ff0ed89c2f56bd722ae3ca

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