Malicious PDF — malware analysis report

Static analysis result for SHA-256 98cb459cbf5bd6ce…

MALICIOUS

PDF

41.1 KB Created: 2020-08-02 15:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 637b0bb5c8ba39e63eec6dfeef4cdb8a SHA-1: d586a9b9f6a4c45540312d0ff303d2f54677835e SHA-256: 98cb459cbf5bd6ce5441476be69853dadf48bba39c53ff2ba23c994008e0b215
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, containing numerous external links. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com', which likely serves as a gateway to malicious content. The document body, though heavily obfuscated, contains references to URLs that are also present in the extracted URL list, reinforcing the link-based attack vector. The primary intent appears to be directing users to potentially harmful external sites.

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/pify?keyword=utorrent+default+settings
    • http://files.rochellehallconsult.com/uploads/1/3/1/4/131453610/f05ddf9.pdf
    • http://files.meghanjaneyoga.com/uploads/1/3/0/9/130969220/gibizo_kufazi_gizuto_dutenulobozisa.pdf
    • http://files.exclusivedancerecruitment.com/uploads/1/3/1/3/131384412/821821.pdf
    • https://cdn.shopify.com/s/files/1/0432/4383/1458/files/jiwinadoliwasukiza.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27392185694.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/wan_miniport_ikev2.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2131/files/53782877528.pdf
    • https://cdn.shopify.com/s/files/1/0437/2476/7400/files/filter_by_state_onlick.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/gerokubogifuzalidurizewiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/46345401304.pdf
    • https://cdn.shopify.com/s/files/1/0431/6368/0929/files/wodozidatorujimojokigoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/musigaletataw.pdf
    • https://cdn.shopify.com/s/files/1/0428/4533/9814/files/nifezekilorunozilaxuburo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5419/4085/files/89070462143.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_off0000625b.bin
a76c81cd3622e7aa2875d50e743fcc446dff7e08ea39ff371f52832404badbb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x625B 5064 bytes
font_01_sfnt_off000073a8.bin
b5d15431ce7d9d90c94161183df6b8e59a3cfd836bffebaa6e34c20a1eea1848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73A8 10588 bytes

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