Malicious PDF — malware analysis report

Static analysis result for SHA-256 656e34c676c62778…

MALICIOUS

PDF

52.5 KB Created: 2020-08-25 22:19:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: db828a1ab2a1f432d39110f5f1fc8df0 SHA-1: 48573721dd8ee3d2d8b9b56d594c2bde9e43a3b1 SHA-256: 656e34c676c627786e73c618ee4a051fc03a83d3c67b8e002d5d54876efa33f3
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 a malicious redirector. The primary redirector URL is 'https://ttraff.me/pify?keyword=karasu+yu+yu+hakusho', which is also flagged as an SEO link farm lure. The document body, though heavily obfuscated, contains this same redirector URL, suggesting an attempt to trick users into downloading further malicious content or visiting a phishing site.

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.me/pify?keyword=karasu+yu+yu+hakusho In PDF document text
    • http://files.hombomtoys.net/uploads/1/3/1/0/131071063/362155.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/1/0437/4567/3377/files/99303116571.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4098/7543/files/bounded_set.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5108/1118/files/uu_hak_asasi_manusia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7350/2361/files/waponosoramuvat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5298/8566/files/sfchronicle_voter_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8937/1040/files/20732130505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0865/4492/files/evaluating_algebraic_expressions_worksheets_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5296/3742/files/39297747354.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3630/2750/files/77660543844.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 3

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_off00007655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7655 8204 bytes
SHA-256: cbdb95ed5db75473fc8f1503385adf542197f9a81e568441871fa5fe87be971c
font_01_sfnt_off0000920b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x920B 4876 bytes
SHA-256: 8a8c32b77d8cdfffe155ef0a1dec2c1b184b3e971144b69a813802eb942d40e5
font_02_sfnt_off0000a2a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2A1 10236 bytes
SHA-256: d667c7e6dd8ce7c8d034214f89c17c535085e5f3f34ff34394b9d07b0402b014

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