Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbfcd85afbabe981…

MALICIOUS

PDF

31.8 KB Created: 2020-08-25 04:12:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f1f1249cf42c9520f39e6b92c1c7a14c SHA-1: 39ab2bd84bdb0601f6f8f7db487b891783fed451 SHA-256: cbfcd85afbabe98139e46d56ba7025ce82330721c8c2edd720759d4196e86211
194 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a large number of external links. One of these links points to a known malicious redirector, ttraff.ru, which is likely used to obscure the final destination of the malicious content. The document body contains text related to 'Slayer full album' and the authoring application, suggesting a lure to attract clicks on the embedded links.

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.ru/pify?keyword=slayer+full+album In PDF document text
    • http://files.ctdaus.com/uploads/1/3/0/7/130776407/bededi.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/1/0429/7257/7946/files/pillars_of_eternity_ranged_cipher_build.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5965/9420/files/biblia_ortodoxa_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6953/7432/files/favavazijijigibe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1709/9685/files/aprendizaje_significativo_teora_y_prctica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1271/6704/files/34515136738.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3647/3501/files/fejijimubufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5318/7223/files/56307551012.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/79380772869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6552/3862/files/92518121681.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 1

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_off00004053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4053 5080 bytes
SHA-256: 174df1909562218b3a3d47dd77dbbccdabb2a6596bd97a8278fc51621fe33179
font_01_sfnt_off00005186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5186 10136 bytes
SHA-256: 727b75d26f19e6df6bc5226a3cc34181477125c0920c36f460359d4f26f85ded

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