Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc4106fd0cf5fb2…

MALICIOUS

PDF

41.9 KB Created: 2020-08-23 19:01:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 653659651ebbef9ee2ce4d74fe31d9b4 SHA-1: b459121d0d46dc45a66bb5cf421fbaffaf450072 SHA-256: bbc4106fd0cf5fb25d07714c5e95c45b3a44cc352a920a7905ea9c56112756f1
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=borodin+polovtsian+dances+pdf'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external links, many of which point to benign Shopify domains but are likely used to obscure the malicious redirector. The document body is heavily obfuscated and contains the malicious URL, suggesting the primary intent is to redirect the user to a malicious site.

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=borodin+polovtsian+dances+pdf
    • http://files.agilitydreammaker.com/uploads/1/3/2/6/132696155/869574.pdf
    • http://rakeniv.inkwellretreats.org/uploads/1/3/2/7/132712615/23fac1f8e25d1.pdf
    • http://files.clovevalleycommunityfarm.com/uploads/1/3/1/3/131378991/9790389.pdf
    • http://files.ranchnomade.com/uploads/1/3/1/1/131163854/317a2fc0bbedf.pdf
    • https://cdn.shopify.com/s/files/1/0431/7816/4387/files/cell_parts_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/97584240580.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/xexesutin.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/zilotapemarozup.pdf
    • https://cdn.shopify.com/s/files/1/0430/3018/4098/files/36109392205.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/69449548083.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1547/files/white_rodgers_thermostat_1f78_manual.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_off0000662a.bin
7646bfd78d16eb03d6769bfc6c3a44ca6058ee41ef76152c9c4b15cb0b34b3c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x662A 5256 bytes
font_01_sfnt_off00007820.bin
b3f605d748bd17ea8e061de52be3d8a72526615e7ae458d333fb4929b60bf51e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7820 10240 bytes

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