Malicious PDF — malware analysis report

Static analysis result for SHA-256 91f121a85a980efd…

MALICIOUS

PDF

46.2 KB Created: 2020-07-30 16:40:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b5ebea556c14a2ad1c52e152f6adc938 SHA-1: 7d89714d19e74c15b3ee395ebff507541197bafe SHA-256: 91f121a85a980efd45cd53dee244fef7ba35bb7f148659a0fa2e57c0f22cf4f8
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'uniben admission list 2020 pdf'. The presence of a 'Password-protected archive lure' heuristic indicates that this PDF might be a precursor to delivering a password-protected archive, a common tactic to bypass security scanners. The primary attack vector appears to be directing users to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.ru/pify?keyword=uniben+admission+list+2020+pdf In PDF document text
    • http://files.zhiyuanlin.com/uploads/1/3/1/4/131406535/wozufililarunuvif.pdfIn PDF document text
    • http://files.mayramloeberstudio.com/uploads/1/3/1/4/131453651/laxoro-dakaxugeledegij-gelobap.pdfIn PDF document text
    • http://files.kjlhealthproducts.net/uploads/1/3/1/3/131380354/3443379.pdfIn PDF document text
    • http://files.etherealblood.com/uploads/1/3/1/4/131438163/vuxaverozebewo.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/1/0436/7322/3321/files/85353120607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8000/8355/files/giwazanava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6376/9243/files/wipezikulazejise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/5630524084.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8421/8521/files/sudexevukofojowoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6032/0669/files/22194662000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0292/1111/files/vubolixumivuzutatoniri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3740/8936/files/mazijojafokitetogubegumis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1239/6968/files/68626912454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/kegakilirasowejirekezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2699/5621/files/46248539743.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7654/9798/files/lajasekujinexozijepibo.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 4

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_off000075f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75F8 5284 bytes
SHA-256: 1902a98652c3e1c0c7c2248f114e279065d8fc169823af6c5f0f5136ba802757
font_01_sfnt_off000087cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87CF 10368 bytes
SHA-256: 47e80e423e73bbc266d5bbf5fe7ba4a740887dc7338950bd21b507044cf34348

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