Malicious PDF — malware analysis report

Static analysis result for SHA-256 179382eb69cd3adc…

MALICIOUS

PDF

21.9 KB Created: 2020-07-27 00:43:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c2225053c500e9a81c3c1303145e8596 SHA-1: 77f6c4975e079a0cff72c66db6883fe9a0b7af38 SHA-256: 179382eb69cd3adc3e30745d698d6905d407d2bc5cc46e6a43281f6265e0d6a4
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL associated with a redirector. The document body, though heavily obfuscated, suggests a lure related to "probability pdf questions and answers" to entice users to click the malicious link. The presence of multiple PDF links and a redirector link indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 4

  • 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.
  • 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/wb?keyword=probability%20pdf%20questions%20and%20answers In PDF document text
    • http://files.kinderkiddles.com/uploads/1/3/1/4/131438835/ddfe6cbf96.pdfIn PDF document text
    • http://files.keays2wellness.com/uploads/1/3/1/4/131437978/metuvolabanobabig.pdfIn PDF document text
    • http://files.davidkanmd.com/uploads/1/3/0/7/130775623/b7a8c47fa12bac4.pdfIn PDF document text
    • http://files.whiteimprints.com/uploads/1/3/1/4/131407029/tojapoto_kazarovupam.pdfIn PDF document text
    • http://files.twopondsfarm.net/uploads/1/3/0/7/130740033/13c8078b806.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/85233197074.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/36321469939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9761/0657/files/jurowimawofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1222/7225/files/vililo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6576/8096/files/gotoxewuxilifaresejopoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9734/1604/files/ropojolemuxinudiginagu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2962/4982/files/8349403840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/juninuxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0577/1927/files/19590671451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4856/6938/files/41154929035.pdfIn PDF document text

Related samples 3

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