Malicious PDF — malware analysis report

Static analysis result for SHA-256 687043d3022a54b8…

MALICIOUS

PDF

44.1 KB Created: 2020-08-24 11:01:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 96b14832160f07755fdeec2bb903c2da SHA-1: 53cef7b6b94d1a6f1e4440695383581b6b005dc2 SHA-256: 687043d3022a54b8a54ba53837cfed1eecbf88784f4436242bc67ea123f02e30
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a lure related to riddles and redirects to a known malicious redirector URL. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests an SEO link farm tactic. Although no scripts were extracted, the document body contains embedded URLs that are part of the redirection chain.

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=riddles+and+answers+for+adults+easy In PDF document text
    • http://ketator.heritagefloristcortland.com/uploads/1/3/1/4/131453558/6172085.pdfIn PDF document text
    • http://files.holisticmassagenow.com/uploads/1/3/1/3/131380612/54fcf210c72e.pdfIn PDF document text
    • http://fubijebo.bantrybayponytrekking.com/uploads/1/3/0/8/130814088/mojixanafavobosade.pdfIn PDF document text
    • http://files.speechoregon.org/uploads/1/3/0/8/130814596/bojilepifofib.pdfIn PDF document text
    • http://files.zendope.com/uploads/1/3/2/6/132682471/miset.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/1/0435/5650/3707/files/64798816131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5290/0250/files/18516625387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3986/4485/files/vopitaxiwepizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9380/1625/files/71560007504.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8671/5805/files/valevejupitilotawatil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1492/1112/files/bubibakadopizowitifes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9467/0498/files/career_development_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0227/3697/files/dadezokibegad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jenodilibaxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0323/8811/files/16940921163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/datumaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/65878970573.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1677/4054/files/a_level_african_history_notes.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 8

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_off00006efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFD 5104 bytes
SHA-256: 0a91f29f61ac4ffb8423bd69b65dddd7a80f2c1ea7e9a9cee014bdf7119c82ea
font_01_sfnt_off00008078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8078 10044 bytes
SHA-256: 02e8ecdeb95f3c402cd0d22b3b30841a0729552df7b5cca4d6ee79348918b396

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