Malicious PDF — malware analysis report

Static analysis result for SHA-256 81bede0e7dabece7…

MALICIOUS

PDF

44.1 KB Created: 2020-07-24 01:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 667bb1707ff138b98c7197a3e72cf582 SHA-1: b02b723fab624165215bffcd24789035b776dfd9 SHA-256: 81bede0e7dabece704c38d811a9d1765001e2f431968fa8ce58f3839b1327aa8
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for redirector links pointing to malicious infrastructure. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains text suggesting a lure related to 'Greek waters pilot pdf'. The primary IOC is the redirector URL which likely leads to further malicious content or phishing.

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/wb?keyword=greek%20waters%20pilot%20pdf In PDF document text
    • http://files.yorkstone.ca/uploads/1/3/0/7/130740438/notidi.pdfIn PDF document text
    • http://files.bellafurworks.com/uploads/1/3/1/8/131856381/duguvat.pdfIn PDF document text
    • http://files.northidahocasa.org/uploads/1/3/2/7/132741198/0e7ca2980.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/1/0430/6419/7273/files/85091969301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5320/3102/files/35957224804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/votexagunogadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9833/9496/files/bizewapidajivipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/39284394211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9304/1053/files/lusowujab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0346/1283/files/82263693762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0066/8065/files/76002678333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6263/9269/files/72644185851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/70612703728.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5653/6471/files/genijunevusugem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6925/1492/files/depenemewugopigojuru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4870/4917/files/58834205315.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7220/0608/files/43813459901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7618/0376/files/zujonafesuxuj.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_off00007137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7137 4904 bytes
SHA-256: caaf38ae8615fc05de3bc1ba11913feb419d35a677a25f4e6c062291ae9f726d
font_01_sfnt_off00008214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8214 9784 bytes
SHA-256: 5e770eda7628a0c623dc0bfdf6ed51c3f2f6621aedaff71d557743c98dfaf655

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