Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f0339eb7dfb8bbd…

MALICIOUS

PDF

40.6 KB Created: 2020-09-19 08:40:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0601ba6596c1d9f9dfe8be291e249112 SHA-1: 5c07bd313d445fb4c174abeab2e010e5c4096040 SHA-256: 3f0339eb7dfb8bbdd9298b40b82c3923a5f252f26742469d6fed34c434107b99
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. The document body itself is heavily obfuscated but contains the URL that leads to the malicious redirector. The PDF also contains a link farm heuristic, indicating a large number of external links, many of which point to Shopify domains. The primary malicious URL is https://ttraff.club/wix?keyword=macbeth+act+3+vocabulary+worksheet, which is likely used to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/wix?keyword=macbeth+act+3+vocabulary+worksheet
    • https://cdn.shopify.com/s/files/1/0438/0223/0944/files/5350978445.pdf
    • https://cdn.shopify.com/s/files/1/0436/1116/0739/files/gowadojaweroj.pdf
    • https://cdn.shopify.com/s/files/1/0432/3419/7666/files/lorodoginet.pdf
    • https://cdn.shopify.com/s/files/1/0434/7622/2118/files/shulker_box_colors.pdf
    • https://cdn.shopify.com/s/files/1/0433/3908/8022/files/81466478525.pdf
    • https://cdn.shopify.com/s/files/1/0434/2035/2677/files/nifumapub.pdf
    • https://cdn.shopify.com/s/files/1/0437/9885/5837/files/diana_hacker_pocket_style_manual_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/5624/1557/files/87299736511.pdf
    • https://cdn.shopify.com/s/files/1/0435/1292/2264/files/37879068147.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81858120772.pdf
    • https://1984fb27-eba0-4373-b64d-83be342a8208.filesusr.com/ugd/724fb5_a6e6c050e17f425688a57ede26a55c41.pdf?index=true
    • https://6adc5b30-623d-429c-a601-cd8d13e6c608.filesusr.com/ugd/913720_8ff5efd2b6774f3387dfa63fd6227e7b.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005431.bin
8e68b7c1dbfe06cbecff2b81ee8d23d8a75911dae5f5b8e167a6ca497ff68659		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5431 5240 bytes
font_01_sfnt_off00006636.bin
5d1844a4097258e41051c50805ad360651f787de24304f1a2decce85ddc47da9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6636 9800 bytes
font_02_sfnt_off0000879c.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x879C 4324 bytes

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