Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6c7b71db726f9b5…

MALICIOUS

PDF

39.5 KB Created: 2020-08-17 09:30:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c52dacaecf2639953053d0571c68f754 SHA-1: 9caf0fedf03496d2d6a6b43c1f137b3612275c4b SHA-256: b6c7b71db726f9b509518a703fde59254f3cf98dedfe8eeff1da31c3964026db
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious infrastructure, specifically 'ttraff.cc'. The document body text includes the search query 'Brooklyn nine nine season 1 yify' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous other links to Shopify domains, some of which are benign, indicates a link farm strategy. The ML classifier strongly flagged this PDF as malicious.

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=brooklyn+nine+nine+season+1++yify In PDF document text
    • http://files.westvillageclothing.com/uploads/1/3/2/7/132740838/906577fcb.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/1/0447/6190/7351/files/12122450929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3338/7423/files/tumodek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/atkins_fisicoquimica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nefodegaxinavikiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0978/5512/files/levelomuwamewotowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2091/7668/files/guide_taille_ceinture_diesel_homme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6880/1695/files/86091544708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/gazinubodiposo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0677/0849/files/5092647604.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8014/6339/files/59586761102.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9456/3221/files/45439660482.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E44 5028 bytes
SHA-256: 0c34e2f83d2a6fa347317b8d3e683dca741ab401d5a9409848c8c18f6e09be0a
font_01_sfnt_off00006f7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7F 9980 bytes
SHA-256: 1a3f7210b66f8de010a4448acf6b1bc601911e221dcc83a4499ff35192b1a6c4

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