Malicious PDF — malware analysis report

Static analysis result for SHA-256 21ba4d2ef89fb18d…

MALICIOUS

PDF

41.9 KB Created: 2020-08-22 01:49:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5010dc305e5c06da4df4f54b55012376 SHA-1: 9e4011aaf54254767b9cd1d819a011d077e6a739 SHA-256: 21ba4d2ef89fb18d6d47c6f4d86b8d0ad513fab7d1dee05bedcfd3567a3bdb4c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, directing users to a URL associated with malicious activity. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, contains the primary malicious URL and several benign-looking Shopify URLs, likely used to mask the malicious intent. The primary malicious URL is 'https://ttraff.ru/pify?keyword=inductive+reasoning+worksheet+geometry', which is designed to redirect users to further 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.ru/pify?keyword=inductive+reasoning+worksheet+geometry In PDF document text
    • http://files.jehoshuabrown.com/uploads/1/3/0/7/130775205/tezifuza.pdfIn PDF document text
    • http://nojasekak.kncperformingartscompany.com/uploads/1/3/1/4/131437208/woduliluteja.pdfIn PDF document text
    • http://files.threesisterscommunityfarm.com/uploads/1/3/1/1/131164176/87cc6bc.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/1/0428/8148/2919/files/nemivedupabevunimetu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1586/3447/files/43109074721.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8984/4631/files/21353639397.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4953/9989/files/86389643186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5780/6486/files/20646776661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9117/3282/files/cassandra_java_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3532/6624/files/real_estate_lease_addendum_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0311/7721/files/holistic_nursing_scope_and_standards_of_practice.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8348/9687/files/22672029944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3940/7784/files/mixefuzumasiguvawawodek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6823/5675/files/59012158369.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 1

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_off0000658f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x658F 5576 bytes
SHA-256: 9c94b6d26eb4654868f4f1bf1e0657c9c06e21259068788bd8b4eb95b22c1a07
font_01_sfnt_off0000786e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x786E 10048 bytes
SHA-256: 3a63f8a8a2c295bebc4c9e3797d2a20b1d354cc8d5d1eb8a8e554770a9758b90

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