Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f78f3cee486384e…

MALICIOUS

PDF

40.2 KB Created: 2020-08-28 11:30:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2de9b744d222516e2657c52665cfd1c9 SHA-1: fc5557cc58cc7b6a688ad5f5b7094e98406912c8 SHA-256: 9f78f3cee486384eee4554216ac82a94e4b4097c0cd744b116218bcfcf82f307
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though partially corrupted, contains the URL 'https://ttraff.com/pify?keyword=ontslag+van+werknemersbrief+steekpro', which is also present in the heuristics. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various domains, including several Shopify-hosted PDFs.

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=ontslag+van+werknemersbrief+steekpro In PDF document text
    • http://rubilo.agbio-inc.com/uploads/1/3/2/6/132683130/316ed0b4faced.pdfIn PDF document text
    • http://files.mycousa.com/uploads/1/3/2/8/132814958/kulebek-rezorusozu.pdfIn PDF document text
    • http://files.portlandgiftguide.com/uploads/1/3/1/1/131163540/7493212.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/1/0429/8443/9971/files/allen_bradley_powerflex_525_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9986/4734/files/47973296137.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2255/7095/files/96531816307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6598/2632/files/91315196621.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1161/8462/files/motulek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/7071/1958/files/86894297930.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0459/1255/files/valulamagavuranagotuvofek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/61498301603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0394/4853/files/brixx_pizza_nutrition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2862/6080/files/vedudesarizebure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3620/5479/files/asma_gina_2018_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97072231683.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_off00005ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA8 5604 bytes
SHA-256: 669860ffbf5ff655d041f19f4d71489a4a5533c04d8118e4f098b650e7cea9e5
font_01_sfnt_off00006fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB4 10720 bytes
SHA-256: cf4a94d45c1eb9027b28cea8c987d69eea18a0c83df51e2b8ec6434fb4c20400

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