Malicious PDF — malware analysis report

Static analysis result for SHA-256 944e110b237372ac…

MALICIOUS

PDF

41.1 KB Created: 2020-08-14 02:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a1fefef3364a17e36dead4ccc0634463 SHA-1: 30cd87c8ef18430f3dc07ee14777666323ead082 SHA-256: 944e110b237372ac3368063008f82683b1ccd1440cb6118664d8f5e12afc593a
194 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to ttraff.ru. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The PDF_SEO_LINK_FARM heuristic further suggests a large number of outbound links were generated, likely for SEO manipulation or to obscure the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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/wb?keyword=facebook%20developer%20guide%20pdf In PDF document text
    • http://files.emilycavanaghauthor.com/uploads/1/3/2/6/132680808/6793363.pdfIn PDF document text
    • http://files.marriedmeakiwi.com/uploads/1/3/0/8/130874119/fetupetiloxubov.pdfIn PDF document text
    • http://files.netherwoodtennisclub.org/uploads/1/3/0/8/130814666/b102f7.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/1/0431/8344/0030/files/base64_string_to_jquery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45927795399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3630/2750/files/radius_diameter_circumference_and_area_of_a_circle_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0896/6307/files/93790827690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/34497366886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/zerenataxanewane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1237/4174/files/80298685803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/8137/2582/files/22376035993.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7066/8448/files/fewapilaverexos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21617342462.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0624/5539/files/84381464882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/56046314976.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_off00005f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7C 5364 bytes
SHA-256: c4bcf5670e1c47d11b23f943dcd732aa0133951705cb3e2878eeaf96f1769ace
font_01_sfnt_off000071cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71CC 10592 bytes
SHA-256: 6ca5d7f903c41aec87e004d9bafad1ac308ac10e0881ea047dd5280968dfd47d

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