Malicious PDF — malware analysis report

Static analysis result for SHA-256 d559fc59503719b6…

MALICIOUS

PDF

46.3 KB Created: 2020-08-31 02:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ceace11142f8b017e5acdfc589d7de29 SHA-1: ce7c501015055e9e40be5dc39d676605dbb3814d SHA-256: d559fc59503719b6b1bc7832d85ebb862514a66fc05ab7c060743fa5e86178f8
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple heuristics indicate malicious activity, including a critical finding of a link to known malicious redirector infrastructure. The document body and extracted URLs suggest a lure related to 'The Witcher Succubus', likely intended to trick users into clicking the malicious link. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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/wix?keyword=the+witcher+succubus In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/3eed2b_39b83ce2ba0d4c0a9a30b3420edc99aa.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_6366e65a4a3b459eb9fa0198f48752ea.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e3ff21_a6d841744ee54d2996dafa3d68ffc7a7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3aca14_94b3f1ae06434973a1df7ac0ab1ceb13.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b9a69bcc4ee8492594ddbdeac6519153.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_424d2e06a9b944198bb36cef0e58beaf.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_1c33e3f531014b3c90fcdd6ab20abac3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b48b60_f3d3b6ae36a34c34b474c579861cc46d.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3348/5727/files/80151198708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwunojipodaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/1841/5254/files/63536712951.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1629/7368/files/68544529174.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_off00006e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2B 4828 bytes
SHA-256: 5dbcfe08ab291934c565d99abe3dd7e4679ae4cd840078381bf0b9f1c5a5be69
font_01_sfnt_off00007ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA4 14684 bytes
SHA-256: 2ee81e1e8701533c0ad41aa83fd60e275271fec3bc9341c2aba4132c0e884841

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