Malicious PDF — malware analysis report

Static analysis result for SHA-256 77932ba3b62b930d…

MALICIOUS

PDF

43.0 KB Created: 2020-08-18 14:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c636e4ad64dba1e91d75a5e2d9475c8c SHA-1: a50ecb44ccff2eb5a2ba5fc0acafdabc32f4f7de SHA-256: 77932ba3b62b930d38c6f09ec041ac219309650ed504db831e1f09b999f09add
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting a phishing or scam campaign. The document body, though corrupted, contains a URL that matches the redirector found in the heuristics, reinforcing the malicious intent. The ML classifier strongly flagged this PDF as malicious.

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=application+format+for+college+professor In PDF document text
    • http://files.glacierbaysportfishing.com/uploads/1/3/1/0/131070291/93164fa08c215c.pdfIn PDF document text
    • http://fusoz.coastalbeachestherapy.com/uploads/1/3/1/4/131452890/0a1fe76451ce4.pdfIn PDF document text
    • http://files.virtuallysmoothpiano.com/uploads/1/3/1/8/131857920/1833890.pdfIn PDF document text
    • http://files.phase3security.com/uploads/1/3/1/4/131409508/kewavimefaxalun.pdfIn PDF document text
    • http://files.mandarin4u-sd.com/uploads/1/3/1/6/131636819/jenolubava.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/1/0433/8669/9925/files/mahindra_tractor_575_parts_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8104/0033/files/lusevojevegabevibasawirub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84312174386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4042/3592/files/pulse_width_modulation_principle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94448736580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5656/9247/files/6870019404.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/1702503143.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3975/9259/files/vebodiligogo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/51311909121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0532/1109/files/zefulazasuwawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0098/7801/files/adobe_photoshop_premiere_elements_13_manual_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/5686/1077/files/duvibonewiwefe.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 6

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_off00006b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1C 5324 bytes
SHA-256: 3c55cccd36b6095c1ee032aa4db5a32cae876d49a0744afc8a5f54be80c03c67
font_01_sfnt_off00007d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D1B 9948 bytes
SHA-256: c47992a6e505dc2adcac24b7f09843f8f824a188f4988b888518cf2f760f0257

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