Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f656b46aa91ec48…

MALICIOUS

PDF

38.6 KB Created: 2020-08-01 15:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 559691760085b6f1bc5f66aa1c075066 SHA-1: 21d7750fb11207e4571ac4f9b2cd7b73c861f42e SHA-256: 4f656b46aa91ec48e246332acd44b02e721399fe937d6fc815ea95ed31169b3c
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. One of the primary links points to 'ttraff.cc', a known malicious redirector. Another heuristic identified a PDF link farm, suggesting the document's purpose is to distribute links to other potentially malicious or SEO-manipulated content. The document body itself is heavily obfuscated but contains references to the song 'Gorillaz kids with guns' and 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.cc/pify?keyword=gorillaz+kids+with+guns
    • http://files.corletochemistry.com/uploads/1/3/1/4/131408117/7296198.pdf
    • http://files.growinginhisgraceblog.com/uploads/1/3/0/8/130814423/tomifukoletupek.pdf
    • http://files.sorrentosak.com/uploads/1/3/0/8/130874010/5750621.pdf
    • http://files.kaitiakirestoration.co.nz/uploads/1/3/1/1/131163955/buluzejugaf-ralap.pdf
    • https://cdn.shopify.com/s/files/1/0427/3097/9495/files/5275382561.pdf
    • https://cdn.shopify.com/s/files/1/0430/9699/8048/files/69425164891.pdf
    • https://cdn.shopify.com/s/files/1/0431/4644/4960/files/ae_country_code.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/gujitavapuvujoser.pdf
    • https://cdn.shopify.com/s/files/1/0435/8691/2415/files/18640860240.pdf
    • https://cdn.shopify.com/s/files/1/0432/1548/7133/files/wuxerakuge.pdf
    • https://cdn.shopify.com/s/files/1/0428/2823/4908/files/zikovobu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7834/4085/files/81314307761.pdf
    • https://cdn.shopify.com/s/files/1/0429/5639/0559/files/folamepapegew.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8272/files/dulutevesekewogitizajuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mosagewenusuwaguxizekud.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_off00005a21.bin
67bdab15d48b40108a6c3385612c220c52e5d7a816475198681a310350d80788		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A21 5324 bytes
font_01_sfnt_off00006c54.bin
fb972cd25392027b7aa0f039bf906144227812fbb26d875213377d2afbef0147		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C54 9816 bytes

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