Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fc42eef140186c7…

MALICIOUS

PDF

34.7 KB Created: 2020-08-11 20:47:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cebe80e1ea8dfd39c63d6c65acc592e2 SHA-1: 940879c84f86f8e78bc0479bc539eed7905cf592 SHA-256: 9fc42eef140186c7e1668a2b6387f1a294a0cc8ba579cc6be1200c94dba60708
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to redirector infrastructure like 'ttraff.com'. The document body, though heavily obfuscated, contains text suggesting it is a 'systems of equations and inequalities test pdf', which is a common lure for phishing or malware. The presence of multiple external links, including those to potentially malicious redirectors, indicates an attempt to lead the user to a malicious site.

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=systems+of+equations+and+inequalities+test+pdf In PDF document text
    • http://kibofe.alicelawrancexx.com/uploads/1/3/0/7/130739206/4d298280.pdfIn PDF document text
    • http://duper.samanthapagnotta.com/uploads/1/3/1/4/131483372/ac92d90bcc.pdfIn PDF document text
    • http://files.sardishenderson.com/uploads/1/3/1/3/131398148/sogalozigek-galop-babasunav.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/1/0433/0687/7080/files/wetidolurat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7500/9686/files/basic_unix_commands_for_oracle_dba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7133/1734/files/61502134437.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4782/2236/files/adding_features_to_a_logistic_regression.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2014/0191/files/wind_waker_strategy_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/sudetuwopemawofipotipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4857/4884/files/89541690479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1564/3031/files/dezuxilexogugeriwinipugor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5509/4679/files/32485102921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5804/4826/files/zuzazufefikizivuvul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7798/3653/files/77577361856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9565/4554/files/79804927179.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 2

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_off00004a3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A3A 5420 bytes
SHA-256: 6b9541f96dda7f1642b5e1d0f3c1f7e125acebf907bdbdbae8404431801f384f
font_01_sfnt_off00005c9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9A 9656 bytes
SHA-256: 7f594e0796874cab6ace34d4107ab622825c22f3f08df0a19f58856a4715c588

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