Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ec230971a842d3…

MALICIOUS

PDF

137.5 KB Created: 2020-08-06 16:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b81783c8759e82878c590062fc2ec1dd SHA-1: 3b9db6e694da7650013e2f735de30593bdebf842 SHA-256: f8ec230971a842d39060d8c9ea399dc5a14f61742a445f4de397786969f2316e
150 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, pointing to 'https://ttraff.ru/pify?keyword=difference+between+afforestation+and+deforestation+pdf'. This URL is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains the same URL, reinforcing its role in the attack. The presence of a link farm heuristic further suggests a malicious intent to distribute links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=difference+between+afforestation+and+deforestation+pdf
    • http://files.artbykerryhenderson.com/uploads/1/3/2/7/132712369/1744038.pdf
    • http://xipifa.jamesazarzana.com/uploads/1/3/1/4/131406082/7905980.pdf
    • http://files.lucioconstructioninc.com/uploads/1/3/2/6/132696044/bufutukibeli_wororubuj_nisafelun.pdf
    • https://cdn.shopify.com/s/files/1/0434/5508/6742/files/81463456194.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/rate_my_professor_nau.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/bebagit.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/62884124028.pdf
    • https://cdn.shopify.com/s/files/1/0434/0888/3870/files/45508112317.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/disunirolojilom.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/analise_sintatica_em.pdf
    • https://cdn.shopify.com/s/files/1/0440/6912/6309/files/xibujisedifawele.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/85564624838.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_off0001dfc0.bin
5667af0625cff1c49f8ea88dc2f4831b756b045eacdbc32aea99d787cb07c46b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DFC0 5348 bytes
font_01_sfnt_off0001f210.bin
166f9acc4d7298ec06e1a99beebc5c2fb92b7042f87a48207f827578af9e0fb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F210 11168 bytes

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