Malicious PDF — malware analysis report

Static analysis result for SHA-256 c232fc54a9fbec6b…

MALICIOUS

PDF

62.9 KB Created: 2020-08-07 21:18:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 394080009a6012d2f5329392c8179cd5 SHA-1: 5306b6fc9c5972dd0232aa6b4e78107feedea0bf SHA-256: c232fc54a9fbec6ba258bb0779aeaca19e880f5283064fc598ffe54af7dc5f24
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'inflammatory bowel disease journal pdf' and a URL that appears to be part of a link farm designed to manipulate search engine results. This suggests the document is a lure to drive traffic to malicious infrastructure.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=inflammatory+bowel+disease+journal+pdf
    • http://files.carlyle-consulting.us/uploads/1/3/1/1/131163898/3576572.pdf
    • http://files.sydneynewhorizons.org/uploads/1/3/2/7/132710787/lozaratorepu_tatira.pdf
    • http://files.waiheelimu.org/uploads/1/3/1/6/131607174/nomuvawezilamaranu.pdf
    • http://files.misshaleyart.com/uploads/1/3/0/9/130969751/dizumijokabit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9203/4211/files/kokafano.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/whirlpool_cabrio_dryer_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/5362/8062/files/16328794904.pdf
    • https://cdn.shopify.com/s/files/1/0434/8903/4402/files/vodonubis.pdf
    • https://cdn.shopify.com/s/files/1/0434/0531/2154/files/lopobufusasiwisubigun.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gumatuzonew.pdf
    • https://cdn.shopify.com/s/files/1/0440/9124/4696/files/jugemupapajaxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/3151/8622/files/96940091572.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/xizuzasasaniwofubu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4048/0164/files/autodwg_dwg_to_converter_full.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_off0000b65a.bin
e73a064c0abf6a015a0b3d2bc59291079790b64a9183c6120852331542642fbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB65A 5536 bytes
font_01_sfnt_off0000c92b.bin
907a4b92b5231697014adb8e50e9dda7df94b594f8dffbacc84695312fbdbece		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC92B 11008 bytes

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