Malicious PDF — malware analysis report

Static analysis result for SHA-256 c837aae96997a771…

MALICIOUS

PDF

36.0 KB Created: 2020-08-21 22:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69103d3fce59a5c8fd11b206d97b67e2 SHA-1: 3487ac7a0ac6798758be28e51d9c99d1e0c8b75e SHA-256: c837aae96997a7716e2bebdfcfac6b87d2f5466a6a3d49cc7cf534f77f51d05a
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One prominent URL, 'https://ttraff.ru/pify?keyword=automation+studio+5.+7++gratis+portugues', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting a lure for users seeking software downloads. The presence of a link farm and a malicious redirector indicates a phishing or scam attempt.

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=automation+studio+5.+7++gratis+portugues
    • http://xapuru.mysuidora.com/uploads/1/3/1/4/131437626/nonumodawizerafos.pdf
    • http://files.alisonblakewriter.com/uploads/1/3/1/3/131382470/3abf01f22.pdf
    • http://zugilazun.northcountygenetics.com/uploads/1/3/1/8/131857284/galeli.pdf
    • http://buvetaji.kansascityamprepair.com/uploads/1/3/1/4/131453501/bizupexebupafususef.pdf
    • https://cdn.shopify.com/s/files/1/0434/8765/8141/files/jupukisepexasatekipip.pdf
    • https://cdn.shopify.com/s/files/1/0432/2885/6487/files/50988463544.pdf
    • https://cdn.shopify.com/s/files/1/0433/9816/8727/files/kalodozaxoxolobapino.pdf
    • https://cdn.shopify.com/s/files/1/0432/2902/0317/files/rifulideroxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7682/files/80544621845.pdf
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/jufisukelavutuguvaluxuri.pdf
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/kalupunuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/9725/1235/files/39200808352.pdf
    • https://cdn.shopify.com/s/files/1/0447/6711/7463/files/nupupixilovikujugefofaru.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_off00004ddb.bin
9feded35634f251ff47fa2dbd04d7c5585a2296d058af77297cbab393ff2471a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DDB 5472 bytes
font_01_sfnt_off00006069.bin
a1797dd5cf2d29e1e9570c753aed95225a81d8cb9cac93700edf95b8a2fab5a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6069 10312 bytes

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