Malicious PDF — malware analysis report

Static analysis result for SHA-256 b969e39be8ccc075…

MALICIOUS

PDF

52.5 KB Created: 2020-08-22 00:10:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 787662d9e1518e7fa59763abdf24b7c1 SHA-1: 24f81870cddcf30511e857b1e3cff468232afc50 SHA-256: b969e39be8ccc0751ac26531d250fc9c66c2a66c5605f312afb12fa82543e774
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with the primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to auditing and accounting, suggesting a lure to disguise the malicious intent. The embedded URLs are likely intended to lead the user to a malicious site for further exploitation or credential harvesting.

Heuristics 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=auditing+computerized+accounting+information+system+pdf
    • http://files.earnbetterfitness.co/uploads/1/3/2/7/132740413/vekifawixuza-kisugalolulol-zoxemibufobu.pdf
    • http://kafale.wsdar.com/uploads/1/3/1/3/131379530/5840361.pdf
    • http://files.baonenterprises.com/uploads/1/3/0/8/130813804/lurib.pdf
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/763442219.pdf
    • https://cdn.shopify.com/s/files/1/0433/5940/4197/files/13955141918.pdf
    • https://cdn.shopify.com/s/files/1/0433/0989/1742/files/mapelazidinawubumepajivaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0436/1884/files/25805148301.pdf
    • https://cdn.shopify.com/s/files/1/0431/4411/8423/files/85579056926.pdf
    • https://cdn.shopify.com/s/files/1/0435/5765/0584/files/kenmore_he2_plus_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/5467/7662/files/loligawapazipawafeve.pdf
    • https://cdn.shopify.com/s/files/1/0437/5180/0981/files/pamez.pdf
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/wuxuwa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/liwisubusamepumiv.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_off000086b3.bin
394ca73f9b0cfa1906cca8d94e3b47ee78b8e8f0cafb330f013b8aa96ff46302		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86B3 5584 bytes
font_01_sfnt_off000099a2.bin
f959786cda3478bf2cd258f45f1c173e7ad8d231598a55c773c60be8e51e964c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99A2 13840 bytes

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