Malicious PDF — malware analysis report

Static analysis result for SHA-256 55863eb55fdf8d45…

MALICIOUS

PDF

49.3 KB Created: 2020-08-27 21:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0765255bdc679c3b61a29c0986784070 SHA-1: 697a6e260943a5d853b3dc7b00054c0cd7600ef6 SHA-256: 55863eb55fdf8d45c3544f00185896ebadb6f8b57218d93429485448971560c8
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF link farm, with numerous external PDF links, many hosted on Shopify. The embedded document body text, though heavily obfuscated, contains the malicious URL https://ttraff.ru/pify?keyword=msi+kombustor+v4, suggesting a lure to a malicious site. No scripts were extracted, limiting further analysis of the payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=msi+kombustor+v4
    • http://mewepu.aerikvondenburg.com/uploads/1/3/1/6/131606677/vepupagazovofaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/1764/1879/files/lebuzavopipuzuzu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5458/0390/files/neuralgia_intercostal.pdf
    • https://cdn.shopify.com/s/files/1/0439/8658/3710/files/pandora_music_pc.pdf
    • https://cdn.shopify.com/s/files/1/0433/9286/0327/files/luluzuxadoweb.pdf
    • https://cdn.shopify.com/s/files/1/0431/6630/2376/files/busirogibosatewosu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7763/2161/files/rorosotedexefap.pdf
    • https://cdn.shopify.com/s/files/1/0430/1737/1797/files/69647729007.pdf
    • https://cdn.shopify.com/s/files/1/0429/2168/9254/files/66888349290.pdf
    • https://cdn.shopify.com/s/files/1/0438/3562/1536/files/muslim_wedding_cards_templates_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/83904233808.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a37.bin
8748f5861be1dabb7b265aab3e6774ae08b310ad6f7425de75241dae0f2e02d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A37 3672 bytes
font_01_sfnt_off0000774a.bin
a9fdaa8d36dd9aed09a5f0a1f547745b6e85e76e05f9268bc68bc0d6f673ed1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x774A 4604 bytes
font_02_sfnt_off00008702.bin
6d89a92d6dba44fa5ea1784ddda86424ea6e9ef6800e42717007cd12ac2e3e4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8702 10288 bytes
font_03_sfnt_off0000aa41.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA41 4324 bytes

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