Malicious PDF — malware analysis report

Static analysis result for SHA-256 f23f462f3a5e288a…

MALICIOUS

PDF

48.9 KB Created: 2020-08-07 09:50:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7dd9ddcdc13a8e383fd09f61bb610cd3 SHA-1: e12320c3fc6fa15ed6b0aa82a03ffe12e8d2065a SHA-256: f23f462f3a5e288a1089c31c33a40376efebc0b5ec6b5aa1702aed2716b725be
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=adjective+noun+verb+list+pdf'. Additionally, another critical heuristic indicates a PDF link farm with 30 external PDF links, many hosted on Shopify. The document body itself is heavily obfuscated but contains the same redirector URL. This suggests the primary purpose is to lure users to malicious infrastructure via a link farm.

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=adjective+noun+verb+list+pdf
    • http://files.westernaustralianshepherdrescue.com/uploads/1/3/2/6/132695679/lujatikok_nonerixalosiku.pdf
    • http://files.richardson-community-psychology.com/uploads/1/3/0/7/130776255/1499603.pdf
    • http://files.mpumcbuilders.org/uploads/1/3/1/4/131406403/titazijubo.pdf
    • http://files.nellkoopmanart.com/uploads/1/3/1/4/131482826/a242aafcc7b156.pdf
    • http://seramup.liveloudgraphics.com/uploads/1/3/1/6/131606349/wupekugozel_nulesegobip_natexer_xinonefap.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2128194791.pdf
    • https://cdn.shopify.com/s/files/1/0437/3640/0037/files/mubiluzafigisemulanuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/difijogumelumot.pdf
    • https://cdn.shopify.com/s/files/1/0428/3033/2070/files/basic_electronics_components_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2791/files/dreamweaver_cc_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0439/0912/0152/files/mass_effect_andromeda_walkthrough_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/7470/7868/files/rupaul_season_6_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9908973296.pdf
    • https://cdn.shopify.com/s/files/1/0432/7522/3206/files/starbound_navigation_offline.pdf
    • https://cdn.shopify.com/s/files/1/0433/7106/9594/files/bunumabarevogurew.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/6902322603.pdf
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/retigarapapigowodusu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/wawoxolovov.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/convert_to_slope_intercept_form_worksheet.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/1/0435/9431/7981/files/6902322603

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b23.bin
c44dea26c07a0f6065fe63ec479be9e4850fa3d01b8001933cf8e776a106890b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B23 5084 bytes
font_01_sfnt_off00007c76.bin
08da7745b2adf21d6d9278c3fb495865fb5c543e5f84357bb435b1f30447773e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C76 13912 bytes
font_02_sfnt_off0000a84d.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA84D 4324 bytes

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