Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa1fd09686a64ab6…

MALICIOUS

PDF

52.9 KB Created: 2020-08-03 13:51:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63b8a52eb41d5ec07bcc61e6ca22028b SHA-1: a0e5e4564208510a983ca5ae5c07f593d1270113 SHA-256: aa1fd09686a64ab6c3a34a146be240299f0443499b17e7f92b3713ef5bf37754
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM indicating a mass external PDF link farm. One of these links, https://ttraff.ru/pify?keyword=metodo+descriptivo+libro+pdf, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to a PDF book. The primary attack pattern involves redirecting users to malicious infrastructure.

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=metodo+descriptivo+libro+pdf
    • http://files.lovejanaco.com/uploads/1/3/1/1/131163976/lumurolaxekefexosime.pdf
    • http://files.aajamn.com/uploads/1/3/0/7/130740571/leseronezis_wirogaramemi_dofufira.pdf
    • http://files.porthcawlmuseum.com/uploads/1/3/0/7/130739719/4416333.pdf
    • https://cdn.shopify.com/s/files/1/0440/1207/7206/files/zizulinagudarewibibog.pdf
    • https://cdn.shopify.com/s/files/1/0431/3723/7146/files/73500119819.pdf
    • https://cdn.shopify.com/s/files/1/0440/6145/8582/files/kaxosinof.pdf
    • https://cdn.shopify.com/s/files/1/0435/6535/1073/files/bogatokununaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wojilezufaguxulidumusad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9137/8854/files/73189428590.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/kulekimokojukonaxubu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1517/5335/files/gas_food_lodging.pdf
    • https://cdn.shopify.com/s/files/1/0435/8638/8136/files/kenanelokijiroponep.pdf
    • https://cdn.shopify.com/s/files/1/0440/6598/0581/files/fujekisaripijujulubapoxiz.pdf
    • https://cdn.shopify.com/s/files/1/0436/7079/8489/files/kanubumulefilubidomose.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72710717911.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000082f7.bin
5722dcf7c6624ba6fe41024054f4eeaefb9b14a9336daa5734aa1b69b870918b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82F7 4828 bytes
font_01_sfnt_off00009380.bin
9f1072e9698442d9880626283c80a6f1318e48514a4921ce5fbecce6c9abb837		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9380 10860 bytes
font_02_sfnt_off0000b6a3.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6A3 4324 bytes

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