Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f910867f1aefb3…

MALICIOUS

PDF

39.9 KB Created: 2020-08-19 13:01:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8ae6533f8abcd2a601e47f12d3b23b15 SHA-1: 924e6e0f4e67240c80ee8331e3c31370b6b05ab7 SHA-256: d6f910867f1aefb333f8ed1c14a08082a2626c38c2997f591473101017b16d0a
194 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, masquerading as a free resource for 'English grammar games'. This indicates a social engineering attempt to direct users to malicious infrastructure. The PDF also contains a large number of external links, many hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure the final malicious destination.

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.cc/pify?keyword=english+grammar+games+free In PDF document text
    • http://dasota.pauladuartetango.com/uploads/1/3/1/6/131637814/fc787047c288.pdfIn PDF document text
    • http://files.hannahfairchild.com/uploads/1/3/0/8/130814056/zunowefinubin-barenojajuve-fibetopiwegobu-tokibiwi.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/1/0431/2167/2356/files/81900753065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0238/7867/files/vazodobopuxala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4689/4758/files/genetic_mutation_diseases.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5399/6442/files/58388586589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/livro_epidemiologia_grtis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9799/7991/files/kavuselaruvup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5710/9399/files/variable_frequency_drive_project.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6827/7404/files/vitirirari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8425/1285/files/xububasadafegoziwuwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1093/1358/files/principles_of_electroanalytical_methods.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 5

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_off00005f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3A 5140 bytes
SHA-256: c42a414dfc4e244d8bcfa81534ebda107f59c931a828211f345d92db8ad20d2a
font_01_sfnt_off00007089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7089 10116 bytes
SHA-256: a8cbf70e96469a418d1b9c303ad5c06e23d3e788e4c995ac93ca9ada0e9e84cb

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