Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b93c0ab123dc3b…

MALICIOUS

PDF

39.3 KB Created: 2020-08-13 07:13:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 667a7a32fc682cb0495af7b823c73229 SHA-1: 9184a2d53173f48a4a41adbe15edcae7e2bcf679 SHA-256: 86b93c0ab123dc3bb4a75fa9a6d6a96372ad3ee510015ccb433915779f543c74
120 Risk Score

Malware Insights

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

The PDF file contains embedded links that point to a redirector URL, which is a common tactic for delivering malicious content. The document body, though partially corrupted, suggests a lure related to 'badminton footwork pdf'. The presence of numerous external PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation to increase visibility and traffic to the malicious redirector. 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/wb?keyword=badminton%20footwork%20pdf
    • http://files.glenvarbaptist.com/uploads/1/3/0/7/130776065/3810422.pdf
    • http://files.dysartgoodsco.com/uploads/1/3/0/7/130775299/guves.pdf
    • http://files.ismsiliconvalley.org/uploads/1/3/2/6/132695302/vigomunitexevogod.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7473/files/gupegegifejugu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/731691547.pdf
    • https://cdn.shopify.com/s/files/1/0439/6145/0654/files/vusifivopedugusumafero.pdf
    • https://cdn.shopify.com/s/files/1/0437/8080/0674/files/27180016324.pdf
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/public_finance_n5_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0434/8618/3576/files/one_week_at_flumpty_s.pdf
    • https://cdn.shopify.com/s/files/1/0434/3480/3352/files/86901717111.pdf
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/63805163313.pdf
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/34489701831.pdf
    • https://cdn.shopify.com/s/files/1/0430/3434/5625/files/short_biography_of_albert_einstein.pdf
    • https://cdn.shopify.com/s/files/1/0437/4619/7653/files/90049848787.pdf
    • https://cdn.shopify.com/s/files/1/0429/8519/3621/files/ryobi_gas_weed_eaters.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_off00005cb3.bin
073678288649d2223fcdd51de8f0b30bce7a1504b41fbdc23f4a8f5c672f7c5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB3 5184 bytes
font_01_sfnt_off00006e56.bin
e540adb89b5e8818732174192496afae906a5fc1361c328d25fb764e75286ccc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E56 10068 bytes

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