Malicious PDF — malware analysis report

Static analysis result for SHA-256 670891a16e9800e6…

MALICIOUS

PDF

121.0 KB Created: 2020-08-05 03:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 259f78defe0cbedcbbf44c467f5c5939 SHA-1: 034f182d4d94cf99f5afd43fffa327d916ac98aa SHA-256: 670891a16e9800e608b0b1ff38adf7d7c5493abe5ef21ef7f2441f62a9a5aa83
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a malicious URL, identified as a redirector for SEO link farms. The document body, though heavily obfuscated, contains text suggesting a free PDF download lure. The ML classifier strongly indicates maliciousness, supporting the attack pattern of using a seemingly legitimate document to redirect users to potentially harmful content.

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=les+cerfs+volants+de+kaboul+pdf+gratuit In PDF document text
    • http://lijewi.nightowl-omnias.com/uploads/1/3/1/1/131163667/6fb1c1d156736.pdfIn PDF document text
    • http://files.gotericreativearts.com/uploads/1/3/0/7/130776254/kikopoker_xutovade.pdfIn PDF document text
    • http://fuzenemaw.faharwest.net/uploads/1/3/0/7/130740025/2722053.pdfIn PDF document text
    • http://files.giulioplotino.com/uploads/1/3/0/7/130775221/846659.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/1/0431/7505/1424/files/32904717317.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7063/6710/files/66570548515.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/vezutaropuvimolalewago.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6768/6556/files/32534852897.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3976/9254/files/82587466082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8484/7006/files/list_of_forensic_files_episodes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0389/6217/files/67693843178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/tevafetujewonavatunegom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4659/2924/files/sufelorosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5083/5876/files/juvuwemedifok.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 4

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_off00019b45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B45 5528 bytes
SHA-256: c9ee9c285d7dfcaa415782bfd045b27ebcac496247f586c51f4b88ab393d8aec
font_01_sfnt_off0001ae2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE2B 12664 bytes
SHA-256: 7e0bd5ea49d89eb55ad51f7c95bdd60a08169677a5f2cbab62275b762fd1f194

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