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)
MD5: 74d2d26250b52ea53d9094ab1d1ca4eb SHA-1: 07b56288315c3e301b1c6f998accf5a2beebc005 SHA-256: c2b81858bb38a1a5e26eee7aa1e54754e510cbfbf946791d7dbd6084a942bef8
120 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.

Heuristics 3

  • 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.
  • 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
    • http://files.haywardfitnessfanatics.com/uploads/1/3/0/7/130775174/8e32b317b2c18c.pdf
    • http://files.yunkawasiperu.org/uploads/1/3/1/3/131379612/vizarifogumawov.pdf
    • http://files.statebirdtogo.com/uploads/1/3/2/7/132710687/a1b067.pdf
    • http://files.catherinecarterpainting.com/uploads/1/3/2/8/132814024/8354092.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/59661113219.pdf
    • https://cdn.shopify.com/s/files/1/0433/1818/2041/files/pesigeduxaxafewadizopiro.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/jixovedoguripifof.pdf
    • https://cdn.shopify.com/s/files/1/0432/7974/5192/files/50754826875.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/siranemukuluwezorudajumuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/kubam.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99839510681.pdf
    • https://cdn.shopify.com/s/files/1/0433/7949/0968/files/kuzonakexojiwogiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/7408/5279/files/suladokorobimumizibulejo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0042/9731/files/mibivetedulamizowi.pdf
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/53745554409.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/ratujok.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wudusojixidotivage.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a02.bin
ce6814d46ade0329b5094f28482fb15a2b6e340ab0cfab516b720b69226072af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A02 5524 bytes
font_01_sfnt_off00005cc2.bin
ebfbe612a7c3f66f81861640d160175135b21026a305f79bf7e44ae7f994c7b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC2 9816 bytes

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