Malicious PDF — malware analysis report

Static analysis result for SHA-256 768a8f4501761d25…

MALICIOUS

PDF

32.3 KB Created: 2020-08-10 00:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7eb33c2c4e6da5b75eca38f87f70738f SHA-1: 4a74edd4d1537c59b18e49ceebacee5701eb8864 SHA-256: 768a8f4501761d25a576def514a67adb76526edb38b5541e2117be96c9ee0fca
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to a redirector service designed to obscure the final destination. The primary redirector URL is associated with known malicious activity and is presented as a lure for a textbook download. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to manipulate search engine results for phishing purposes.

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.com/pify?keyword=ways+of+the+world+textbook+pdf+chapter+4 In PDF document text
    • http://files.theredbarnpizza.com/uploads/1/3/0/9/130969057/7144c9e.pdfIn PDF document text
    • http://fezazur.renuartportfolio.com/uploads/1/3/0/9/130969472/1461681.pdfIn PDF document text
    • http://files.careandschool.com/uploads/1/3/1/4/131453022/961151a.pdfIn PDF document text
    • http://files.rebeccasdesign.net/uploads/1/3/1/0/131070633/pesupivebemo.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/1/0437/3646/5559/files/wifekakimedo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0913/8075/files/zerabulikonutelawusuroxox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8857/5638/files/56737909097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2013/2257/files/99245637061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6146/9596/files/veravitaxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4561/5766/files/78126702252.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9932/4580/files/29251794383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1969/7310/files/64571764722.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xutowoterefabobenovise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27392185694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9409/6539/files/viwoxaloxalazedozak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2964/0854/files/ditijofibofozubalubuzux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2511/0952/files/gowegitemurutisexefejijew.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 3

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_off0000441e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x441E 5808 bytes
SHA-256: 325e7cce48512ea9f20016b8dc94f91ba228233a8ac1d843ec308a3608cabccf
font_01_sfnt_off00005805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5805 8260 bytes
SHA-256: 7738b924ba7243fe5a84bb6cbdd3d49baba26164d7af5ce7d446975143f9e814

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