Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8ac648f9d5334a4…

MALICIOUS

PDF

81.8 KB Created: 2020-08-29 16:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f983380a1ced124ae49596921117c9cc SHA-1: f918690cb8c090fa5cb5b23aa5121a0cf7e768f3 SHA-256: c8ac648f9d5334a475a872e00002e43c9dffdbb69bb0a2aa00da9e0d1bab1acb
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic identifying it as a redirector link to known malicious infrastructure. It also contains a link farm with numerous external PDF links, suggesting an attempt to artificially inflate search engine rankings or distribute content through a large number of sites. The primary malicious URL identified is https://ttraff.cc/wix?keyword=black+desert+kunoichi+gear+guide, which is likely used to lure victims.

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/wix?keyword=black+desert+kunoichi+gear+guide 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/b8c837_1fbe7438b0204febb7cdcfe7cc1f4c31.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_6bf577db78e644c4beca561ddad312cb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_1c9c9cb729df4c818de01045768e1714.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_dadf793f1f094f208f6c03aaa8983bea.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4d400c_0cc5657039fc44de98b1d518529750d8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94662163826.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8187/6131/files/73881890198.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1531/5349/files/kajokikaxijozesudozu.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0a593f_529f073cbada4ad48370837d6c92c0a9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_9589c71ba4a94a61961b9f4a1185791f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_3a4dc7d7c37c42408a98ecda436eeb3b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_627f96bf1c454a9d8d855841d8b2b7e2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_edf37f2f5d4346be903f9a7f352090dd.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 5

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_off0000edf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF6 3184 bytes
SHA-256: 26cd4b7c216739b2855cf77b0882590b680568829e9e0af8426bb36846f61eed
font_01_sfnt_off0000f94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94B 5312 bytes
SHA-256: 6900d4e9e6ee190970504494b8f4f8e48299228f7afc0384873045dd9046c8a3
font_02_sfnt_off00010b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4B 14900 bytes
SHA-256: c981ad628990ff8ad3a48518dc3d359d8c6f17c1f3b91ce7a319503c63e06bad

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