Malicious PDF — malware analysis report

Static analysis result for SHA-256 f15316842219c322…

MALICIOUS

PDF

48.9 KB Created: 2020-08-15 02:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 534f60a7b0ea49a86087cbe06b5b1067 SHA-1: f9aa99e6e417f9cd5c5cecc92465e502180e7b8f SHA-256: f15316842219c3225d16d4ac3da5b2db2976487a9585faec2ede783a2b94ee1d
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 a URL that appears to be part of a link farm. The document body, though heavily obfuscated, contains the text 'Certified network defender study material' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous external PDF links further supports the link farm heuristic.

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=certified+network+defender+study+material
    • http://files.dipconcaribbean.com/uploads/1/3/0/8/130814411/xulov-lekinosa-betaberijumi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2791/files/funixunalobowarow.pdf
    • https://cdn.shopify.com/s/files/1/0436/3422/9398/files/biblia_de_estudio_palabra_clave_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0437/8374/9781/files/lodagedevabuxafir.pdf
    • https://cdn.shopify.com/s/files/1/0430/1396/3939/files/butterflies_are_free_play_script.pdf
    • https://cdn.shopify.com/s/files/1/0428/8725/0087/files/lowes_north_attleboro.pdf
    • https://cdn.shopify.com/s/files/1/0439/5443/8302/files/surprise_party_card_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/4465/0651/files/gokobixanisituxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3358/files/60939812951.pdf
    • https://cdn.shopify.com/s/files/1/0429/8237/5577/files/tixirewojetewaliwesijezo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0256/8599/files/fasisijasorikoxas.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0316/files/22802554333.pdf
    • https://cdn.shopify.com/s/files/1/0440/5903/3752/files/jobijavagiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/9471/1203/files/tarekobigol.pdf
    • https://cdn.shopify.com/s/files/1/0437/5488/1175/files/31086541669.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_off00007701.bin
83bfce402851dc6203808a3633105b70824bc7c55747a7d41d99b2581ac741a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7701 5216 bytes
font_01_sfnt_off000088bf.bin
0bbf59efce661e2b8f154e8ff3a01d40977560f8118534817f8584944e2c5ec9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88BF 14840 bytes

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