Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a71a1c0821ccf3c…

MALICIOUS

PDF

39.8 KB Created: 2020-08-16 11:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82f54e70e98cb626d908b98b7b43fb69 SHA-1: e16ee93074638d81c2c1d3dbed4e4c0bc66f0ef9 SHA-256: 8a71a1c0821ccf3c82189a4a693ce3d952ce3dab15f3e3bf0cc93a0f143236cd
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=weather+report+ambala+cantt+10+days'. The document body, though partially corrupted, includes text related to a weather report, suggesting a lure. The file also contains a PDF link farm heuristic, indicating a large number of outbound links, with the primary one being to a Shopify domain. The primary malicious IOC is the redirector URL.

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.ru/pify?keyword=weather+report+ambala+cantt+10+days
    • http://files.montealea.org/uploads/1/3/0/8/130814129/30f2d797.pdf
    • https://cdn.shopify.com/s/files/1/0433/8365/2506/files/26769466417.pdf
    • https://cdn.shopify.com/s/files/1/0428/4402/9084/files/podatujebut.pdf
    • https://cdn.shopify.com/s/files/1/0438/0141/1744/files/28557353478.pdf
    • https://cdn.shopify.com/s/files/1/0430/9565/4554/files/rigeji.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/buvazajegarofezax.pdf
    • https://cdn.shopify.com/s/files/1/0446/2444/5603/files/apple_desktop_backgrounds.pdf
    • https://cdn.shopify.com/s/files/1/0447/5482/9463/files/andalucia_map.pdf
    • https://cdn.shopify.com/s/files/1/0430/8746/2551/files/bijipumetugezifa.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_off000051a4.bin
9fc8e740985bab96acf1c3830eef02c3e8cea8571017aba0aaa289fa8b95fca4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51A4 5760 bytes
font_01_sfnt_off0000652c.bin
39ea3dbbd66ff300ca6075cd5f5ed09a768fb7b9a9d8b4371062cb044206b198		 pdf-font-stream PDF embedded font (sfnt) at offset 0x652C 14020 bytes

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