Malicious PDF — malware analysis report

Static analysis result for SHA-256 96911638dc4a7e90…

MALICIOUS

PDF

56.9 KB Created: 2020-07-23 13:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b40faabd0db72524c5b96c7751461d7 SHA-1: 79e4e2466786706b45c69272d1ca4ccb7d137e69 SHA-256: 96911638dc4a7e902be6cdbc2839f5984c7a988ca082251e7d931864890c0385
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically `ttraff.com`. It also exhibits a PDF link farm, with numerous links pointing to `cdn.shopify.com` and other domains, likely to obscure the final malicious destination. The document body, though heavily obfuscated, contains text related to 'ccda official exam certification guide pdf', suggesting a lure to trick users into clicking the malicious links.

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.com/wb?keyword=ccda%20official%20exam%20certification%20guide%20pdf
    • http://files.juanitashousecleaning.com/uploads/1/3/1/6/131606094/kakedu.pdf
    • http://files.svhcva.org/uploads/1/3/2/7/132712072/79a4447.pdf
    • http://files.emkdgenealogy.com/uploads/1/3/1/3/131383549/8506038.pdf
    • http://files.naturerepublicofficial.com/uploads/1/3/2/6/132681690/b4ffd.pdf
    • http://files.joycegalehouse.com/uploads/1/3/2/8/132814342/xitularalabaxe-wujibafuzun.pdf
    • https://cdn.shopify.com/s/files/1/0432/7328/9888/files/5583759032.pdf
    • https://cdn.shopify.com/s/files/1/0428/5834/8700/files/kufufadusuzizoguwuwu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0323/1903/files/fajetawigokegameguvo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7978/5886/files/jufor.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7668/files/gewulapedebogor.pdf
    • https://cdn.shopify.com/s/files/1/0428/1093/3414/files/89246742686.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/62048847044.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/7434166821.pdf
    • https://cdn.shopify.com/s/files/1/0434/4466/6529/files/73436100769.pdf
    • https://cdn.shopify.com/s/files/1/0430/3893/3146/files/zasewuju.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jisabisagubimebusogapasof.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/7339234692.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_off0000a149.bin
dd18246d577f7854252a83ff2bb518d41b17c77b8070b6f6607e8b3ad32e3736		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA149 5268 bytes
font_01_sfnt_off0000b322.bin
da8cc8d7da2f608404874c9ab2f46a9548ab1ff2958edaab397c3e23fb803b91		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB322 10276 bytes

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