Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c9756ca8953cd0…

MALICIOUS

PDF

41.3 KB Created: 2020-08-31 08:10:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7c6125461b02af759d7ea19cbad9846e SHA-1: 2823ba89ba5ed15a89680f57be72095a1303f981 SHA-256: 56c9756ca8953cd0b11142fa18fdb9c15d04d75fb3407dbde3c7df7f4e47cbfd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Addends

The PDF file contains a significant number of embedded external links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=vid+top+mp3', which is flagged as malicious. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through numerous seemingly benign 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/wix?keyword=vid+top+mp3 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_1902b7e3d2804492a3faf56f5da7441f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_cc105667636b409cac439df943fa0c99.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ab63e3_7d901a613f324802b85e02d7af689904.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_f240cd1c0b674f94bbbda4fcde8a1c87.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1424/8857/files/difazibu.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1f2646_560ab352a26147159532b7cf09e48260.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_ce6250a253c848d9bf17ad1eedaefbd7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1561/8215/files/73271753873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/35494250208.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6518/6206/files/acidosis_alcalosis_metabolica.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 7

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_off00005b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B70 4720 bytes
SHA-256: 6d9d869e9d70977368f8bff3d8dfc276ef9022a5894fe62a30626007ef8d72b2
font_01_sfnt_off00006b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6D 2528 bytes
SHA-256: fe2123dbee4b7bf8755342d2f8fb97f76f6a70077f8b9fc3a8343a1737165214
font_02_sfnt_off0000769d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x769D 9932 bytes
SHA-256: 84d8dfc09c220fae661bde261e0efdd21daacc65618824fa6e7583dd6c5d1bcb

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