Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7facf36d799052b…

MALICIOUS

PDF

43.0 KB Created: 2020-08-29 16:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0bb79308780a2e157df27f151ec781b SHA-1: ec9d6e1942ba12adf3ad354a6a199408139c4e49 SHA-256: a7facf36d799052b1187aeab6edeb30d1df7928de17b4bdc6ebd4be07ba1e68e
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one pointing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a likely attempt to direct users to malicious content. The document body, though heavily obfuscated, contains the malicious URL, suggesting a lure to external content. 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/wix?keyword=stories+of+the+prophets+ibn+kathir+p
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/giloraxewobofupopemaduk.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/lagemavesopelog.pdf
    • https://cdn.shopify.com/s/files/1/0432/5723/3576/files/58082481010.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/2011_buick_enclave_haynes_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/7923/6760/files/81820737865.pdf
    • https://cdn.shopify.com/s/files/1/0434/0708/1622/files/87580013071.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/lekidasovi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0505/1029/files/fufemogekatikipowovi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7742/7609/files/ramibexemimegobibifa.pdf
    • https://cdn.shopify.com/s/files/1/0428/5366/2883/files/14831829293.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec3d689228164c1db9f51abafd93d476.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6c725f526024438b7f4cf0be92ce86c.pdf
    • https://static.usrfiles.com/ugd/b8c837_1dcce9e24629473e9e374a9c32e7160e.pdf
    • https://static.usrfiles.com/ugd/b8c837_0af9b83978c44bed831912b2637f2a8a.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_off00005fe6.bin
f4be0a138fc347c066beb6b71558b5616a0bbd85ab5df1e0e700c3c6f05e6546		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE6 5264 bytes
font_01_sfnt_off000071b9.bin
e5ddb859580b40a9ab2877ecbb84e21732d18c750522dce341866eef7dc1d815		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B9 14692 bytes

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