Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c16bc715e3b7a95…

MALICIOUS

PDF

48.0 KB Created: 2020-08-02 14:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2850dc953694469c1e243f816cccdff6 SHA-1: afab3156168835f63874849f24217e1a6d907ab2 SHA-256: 0c16bc715e3b7a95f4e409cd221425b2e3b8891e6ebf85a1eb991f4be1b75b5b
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=examples+of+interval+variables'. This suggests the document is designed to redirect users to malicious sites, likely for phishing or to download further malware. The ML classifier strongly supports the malicious nature of this PDF.

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=examples+of+interval+variables In PDF document text
    • http://files.camptowandastore.com/uploads/1/3/1/6/131636995/gutupufopadovobivo.pdfIn PDF document text
    • http://files.asantesboutique.com/uploads/1/3/1/1/131163782/topuzodak_jepajepizobiga.pdfIn PDF document text
    • http://files.dancewithmestudios.com/uploads/1/3/2/6/132681670/6445590.pdfIn PDF document text
    • http://files.kellydumont.com/uploads/1/3/2/7/132740278/mosajukuba_lutab.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/1/0431/8016/3227/files/stihl_026_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7753/2822/files/21582528787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0103/6443/files/developer_mode_chromebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/56875389647.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6141/9927/files/30555835327.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/55860745140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5414/5444/files/76908695314.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nisej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2458/7674/files/62671635842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7577/1304/files/9304029980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5247/4280/files/38739314186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8035/8811/files/fapamoresa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/81197857098.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_off00007790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7790 5272 bytes
SHA-256: dac6a79a03e302e250aa333d1304cb6eeddf3d6c2594e6282578b2f172409237
font_01_sfnt_off0000896e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x896E 12832 bytes
SHA-256: 50c19fb891d4348fd4eea121924ccf414bbdb1527949be7c5061f9b33bd69258

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