Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b099b545ee984ff…

MALICIOUS

PDF

49.6 KB Created: 2020-07-30 03:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6190ffe5fea70aa0c2eec0261cf2308b SHA-1: f91dc8e80e59d254bd265cfc35868038ca315d8a SHA-256: 8b099b545ee984ff1f93c2d7635c6c290fd6401417da0a6acc69e040dc533d10
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates that the PDF links to a known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be related to academic notes, likely serving as a lure. The primary attack vector involves directing users to malicious sites via these links.

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=business+communication+notes+for+bba+pdf In PDF document text
    • http://files.wrenphotographynd.com/uploads/1/3/1/4/131406930/gerabegajok.pdfIn PDF document text
    • http://files.erdius.org/uploads/1/3/2/7/132740804/wuwoferanumufib.pdfIn PDF document text
    • http://files.indipix.co.in/uploads/1/3/2/6/132681368/suzepemolaluzi_zomiguwop.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/1/0429/6219/0499/files/57505190272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/22356459904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1474/8322/files/dutujapetiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6179/6248/files/rogitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9212/3556/files/miziwadudama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0982/7231/files/81165589786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7620/6235/files/peletokixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3406/7615/files/77020719383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6499/9590/files/42847204293.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6809/6661/files/88537094782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1938/5504/files/84300899341.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_off00007ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EAD 5340 bytes
SHA-256: a43b579c3182e9151377dadad14e25a9d1685306c94195fd1cd5b036ed7861e4
font_01_sfnt_off000090a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90A6 12724 bytes
SHA-256: 61cc4c5159c0e8efcfe2c40a354b0e0a3ea96cac9da3a145dc474ede8fd8360c

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