Malicious PDF — malware analysis report

Static analysis result for SHA-256 9356a46452113f5e…

MALICIOUS

PDF

48.1 KB Created: 2020-08-07 00:37:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91c40917ac09f853d9f138946725be56 SHA-1: e67a3a324c6308e8b514e2b193191eecdbe7ea97 SHA-256: 9356a46452113f5ed9d5da4d8ea91107c0dc4620557d2fd92578769a93b49143
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=candidiasis+oral+tratamiento+pediatria+pdf'. It also contains a PDF link farm heuristic, with the first URL being 'https://cdn.shopify.com/s/files/1/0437/1654/2632/files/daxonoje.pdf'. The document body, though heavily obfuscated, contains the same URL as the redirector, suggesting the primary intent is to trick the user into visiting this malicious link.

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.cc/pify?keyword=candidiasis+oral+tratamiento+pediatria+pdf
    • http://files.sallybrownkatemorris.co.uk/uploads/1/3/2/6/132695200/gumupamu.pdf
    • http://files.themindfulchristian.com/uploads/1/3/2/6/132681201/vomexokelote.pdf
    • http://viwotus.christinecaseyphotography.com/uploads/1/3/0/7/130776445/6134419.pdf
    • https://cdn.shopify.com/s/files/1/0437/1654/2632/files/daxonoje.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/dewomatarolokakutafago.pdf
    • https://cdn.shopify.com/s/files/1/0440/8328/2070/files/likawivebeburugenazedesol.pdf
    • https://cdn.shopify.com/s/files/1/0440/9769/9992/files/vanagon_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6863/6834/files/32831140376.pdf
    • https://cdn.shopify.com/s/files/1/0437/8260/2904/files/27526642486.pdf
    • https://cdn.shopify.com/s/files/1/0432/1289/8461/files/sorivizivagojanitokigotuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/4186/5384/files/adobe_premiere_alternative.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/mipusof.pdf
    • https://cdn.shopify.com/s/files/1/0440/2328/3862/files/web_of_science_api.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/
    • https://cdn.shopify.com/s/files/1/0432/1289/8461/files

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007051.bin
11217d8456088bfb7a4b022986a0573b413c508fa24b2bd0ebedebd86c4677f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7051 5000 bytes
font_01_sfnt_off00008138.bin
11ec6a21d20862d805aba83dacf93949c5c8028a822512856de235238d02bb0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8138 10576 bytes
font_02_sfnt_off0000a525.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA525 4324 bytes

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