Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f6eb5514790a77…

MALICIOUS

PDF

48.1 KB Created: 2020-07-31 11:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5840fead3c7999f81b3c08e9323bf722 SHA-1: 4dacd62fe29ac2e63428fc2a36c3c88e5ec8eacd SHA-256: 67f6eb5514790a77aff7890c833cbd5d904bfb732130080939961dce0f93cb4a
194 Risk Score

Malware Insights

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

The PDF contains multiple links to a redirector service (ttraff.cc) which is flagged as malicious. These links are presented as part of an SEO link farm, suggesting a tactic to distribute malicious content or phish for information. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the embedded URLs and heuristic firings point to a malicious redirection scheme.

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.cc/pify?keyword=curso+de+econom%25C3%25ADa+de+la+empresa.+introducci%25C3%25B3n+2020+pdf In PDF document text
    • http://files.atohmit.org/uploads/1/3/1/6/131636728/toxerij_dipotunobiwo_jobuxedewisilu.pdfIn PDF document text
    • http://files.houseremodelingsolutions.com/uploads/1/3/0/7/130776590/4743540.pdfIn PDF document text
    • http://files.macdonaldcounselling.com/uploads/1/3/1/6/131636890/dededixubi.pdfIn PDF document text
    • http://files.rotarysanjuanbautista.com/uploads/1/3/2/6/132680922/146664.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/1/0430/2936/4885/files/vewobisapowodur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/zuramaxuradimotawasuvil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/pesag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42539854631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mafimovudowejiner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8032/7070/files/20296967370.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4740/3168/files/sovonatunesib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8207/2732/files/xogukufijewidega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zixetirubopejama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0028/2783/files/30604522213.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_off00007977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7977 5700 bytes
SHA-256: 80557a69bc1fbf58a8413b575689bc066fd50361167359911b01b37f296b1a02
font_01_sfnt_off00008c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C80 11120 bytes
SHA-256: bfe6a5f21e02914735320f7a54d27e8d6f0e082195829f93c75da0b1d70cc05c

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