Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2379f81e9bdde8e…

MALICIOUS

PDF

52.2 KB Created: 2020-08-29 19:51:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d6551f211e097cdf2440b8159ddb92e SHA-1: 25ca18caeccb415a22b7711276b15b9a9ca40cf9 SHA-256: f2379f81e9bdde8ee4e002a5aaf3f905c349bbda882af54e6000cc34389b79b2
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its inclusion of a link farm containing numerous external links. One of these links, 'https://ttraff.ru/wix?keyword=poe+jewel+sockets', points to known malicious redirector infrastructure. The document body appears to be heavily obfuscated or corrupted, but the presence of this malicious URL and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic strongly indicate a phishing or malware distribution attempt.

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/wix?keyword=poe+jewel+sockets
    • https://static.usrfiles.com/ugd/5cf23b_d3d82fa6cba14f0ba92931ab315a3bf4.pdf
    • https://static.usrfiles.com/ugd/b916f4_e00886c4182047c09a0f4f7adfe83c2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_62efa845e940446e88105a7eda97732d.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_ee1a0eb70e374fd9b5c420182b36bb22.pdf
    • https://static.usrfiles.com/ugd/b8c837_1d29f84383674b1c9f043a0dd805f1cf.pdf
    • https://cdn.shopify.com/s/files/1/0438/2470/9794/files/dominio_linguistico_ser_bachiller_2020.pdf
    • https://cdn.shopify.com/s/files/1/0438/4499/3181/files/radelexenuzi.pdf
    • https://cdn.shopify.com/s/files/1/0462/5943/7717/files/consumer_reports_sign_in_login.pdf
    • https://cdn.shopify.com/s/files/1/0433/5609/4614/files/votepul.pdf
    • https://cdn.shopify.com/s/files/1/0440/5837/8392/files/manual_de_campana_extractora_sole.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/77362351677.pdf
    • https://cdn.shopify.com/s/files/1/0431/8042/5370/files/servo_voltage_stabilizer_circuit_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0433/8086/7235/files/differentiation_of_inverse_trigonometric_functions_worksheet.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_off0000726e.bin
f2ca7971d51a311f3acbdad03f6a2d6bff7810c9d94421f641ce4f01061cf0d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x726E 4720 bytes
font_01_sfnt_off000082ac.bin
399de84e42b762b37a4caa7202eddeb86956f1bed42a80087bc3477fd723a557		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82AC 13996 bytes
font_02_sfnt_off0000aea3.bin
840aca7af89d6665d446bd68a022ef871a8c4a07170005e3094ac854b8115bb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA3 16240 bytes

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