Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2b81858bb38a1a5…

MALICIOUS

PDF

34.7 KB Created: 2020-07-31 21:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 74d2d26250b52ea53d9094ab1d1ca4eb SHA-1: 07b56288315c3e301b1c6f998accf5a2beebc005 SHA-256: c2b81858bb38a1a5e26eee7aa1e54754e510cbfbf946791d7dbd6084a942bef8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous links, with one prominently pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'Korg kronos 2 manual pdf'. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content widely. The primary malicious IOC is the redirector URL, which likely leads to a phishing page or malware download.

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.com/pify?keyword=korg+kronos+2+manual+pdf In PDF document text
    • http://files.haywardfitnessfanatics.com/uploads/1/3/0/7/130775174/8e32b317b2c18c.pdfIn PDF document text
    • http://files.yunkawasiperu.org/uploads/1/3/1/3/131379612/vizarifogumawov.pdfIn PDF document text
    • http://files.statebirdtogo.com/uploads/1/3/2/7/132710687/a1b067.pdfIn PDF document text
    • http://files.catherinecarterpainting.com/uploads/1/3/2/8/132814024/8354092.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/1/0429/6104/3605/files/59661113219.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1818/2041/files/pesigeduxaxafewadizopiro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/jixovedoguripifof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7974/5192/files/50754826875.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/siranemukuluwezorudajumuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/kubam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99839510681.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7949/0968/files/kuzonakexojiwogiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7408/5279/files/suladokorobimumizibulejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0042/9731/files/mibivetedulamizowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/53745554409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/ratujok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wudusojixidotivage.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 8

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_off00004a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A02 5524 bytes
SHA-256: ce6814d46ade0329b5094f28482fb15a2b6e340ab0cfab516b720b69226072af
font_01_sfnt_off00005cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC2 9816 bytes
SHA-256: ebfbe612a7c3f66f81861640d160175135b21026a305f79bf7e44ae7f994c7b3

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