Malicious PDF — malware analysis report

Static analysis result for SHA-256 b16476da1cefc7d5…

MALICIOUS

PDF

42.9 KB Created: 2020-08-09 20:13:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ea9501d645fdceed197c60e2e6e233f4 SHA-1: 296aed8d41fec02e6bdafca367c58c78e913d149 SHA-256: b16476da1cefc7d520da272c6cee2aaf9e34550617181af28af82a99c02b5e1e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'etymological meaning of education pdf' and includes the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness.

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=etymological+meaning+of+education+pdf In PDF document text
    • http://files.dottiesflourshop.com/uploads/1/3/1/4/131453267/67bf3ac45d32a66.pdfIn PDF document text
    • http://files.mastertradesmen.co.uk/uploads/1/3/0/9/130969545/warevuri.pdfIn PDF document text
    • http://files.theskincaresiren.com/uploads/1/3/0/9/130969728/3964713.pdfIn PDF document text
    • http://files.zionwyandotte.com/uploads/1/3/1/0/131069887/a886d1e0.pdfIn PDF document text
    • http://files.coldwaterflowers.net/uploads/1/3/1/0/131070525/ea1a548959.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4234/0007/files/25146935925.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9889/7574/files/zitazoza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4674/7803/files/google_image_scraper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6387/5486/files/vertex_cover_problem_is_np_complete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1792/7837/files/linomarogujiwam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3504/9640/files/fenelufozarefuvenibaxena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8908/4068/files/75692957013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3732/6488/files/sbi_account_statement_online_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3382/9277/files/jizarurujijamavesev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1848/4888/files/parasitic_diseases_despommier.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D51 5260 bytes
SHA-256: d2f9d622f4f0ebb1f216db594f2c2f7074cb6ff950a8af33651c9cb0c6b99012
font_01_sfnt_off00006f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3F 9908 bytes
SHA-256: 60bc97958d8f532192c0973fe08edf862e0d507668531ff95ec1737575a15cfc
font_02_sfnt_off00009159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9159 3280 bytes
SHA-256: 26bd97148eb5ea38251dab6559d0763f4a2e39c6311c77554731d40a220ac3b7

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