Malicious PDF — malware analysis report

Static analysis result for SHA-256 548f7e1369d7ccee…

MALICIOUS

PDF

37.6 KB Created: 2020-08-10 03:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 967aadedb6f5642da0ad91546216b0f9 SHA-1: 97b6652c15add9ad6b645935c49eb5350bc3c750 SHA-256: 548f7e1369d7cceee3ace568aff820d9b0de6fa31e572fd7fc797e3883dd1746
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external PDF files. The primary malicious URL identified is https://ttraff.ru/pify?keyword=algebra+and+trigonometry+for+college+students+2nd+edition+pdf+free, which is likely used to redirect users to further malicious content. The document body contains garbled text but also includes the same malicious URL and several other PDF links.

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=algebra+and+trigonometry+for+college+students+2nd+edition+pdf+free In PDF document text
    • http://poravo.mrchunsclass.com/uploads/1/3/1/0/131071157/21792845b7.pdfIn PDF document text
    • http://favuza.wildelabben.com/uploads/1/3/2/6/132682883/xofakisid.pdfIn PDF document text
    • http://files.mrquerino.com/uploads/1/3/2/6/132681452/puviwafexuwa_gakevabewobag_pitimajugokaror.pdfIn PDF document text
    • http://kurese.solarcarchitecture.com/uploads/1/3/0/8/130814328/2008794.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/1/0436/1843/5229/files/radio_anatomie_du_pied.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7826/2692/files/87944312884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8001/5262/files/zufefewubopelajakawose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3598/4029/files/bajelekek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8394/7414/files/16735205517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1355/4855/files/popojubowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0279/7986/files/download_kamus_indonesia_arab_lengkap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8638/1207/files/supply_chain_management_a_logistics_perspective.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8214/5182/files/39846122692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4888/5662/files/naziratovirofi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7292/9435/files/35797259703.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8050/6791/files/estrutura_de_um_site_em_html_tags.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_off0000526b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x526B 5836 bytes
SHA-256: 87a0309f2cf2f929a3e1ed40e3bf6eab7829bec32e49744c2ef6036495894ded
font_01_sfnt_off00006645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6645 10180 bytes
SHA-256: 1597b1015db39b236c3d25187e084f917a045513b11d286a127e620fd47420c2

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