Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8f358ccf9871f80…

MALICIOUS

PDF

46.9 KB Created: 2020-08-30 14:42:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 209cfcf9b813cc5f764aeb01ba2b3bf1 SHA-1: 09497279170b9a5fd9f3287c232bdcd24293f4fe SHA-256: f8f358ccf9871f80cc4d2fb842fc24b6d41186288b26879e39ac5129f3e5ad1b
130 Risk Score

Malware Insights

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

The PDF file contains a lure suggesting it is a 'fair risk assessment methodology pdf'. It embeds numerous links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.cc/wix?keyword=fair+risk+assessment+methodology+pdf'. This indicates a phishing or social engineering attack aiming to redirect users to malicious sites. The document body, though heavily obfuscated, contains the malicious URL and other benign-looking URLs hosted on static.usrfiles.com.

Heuristics 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.cc/wix?keyword=fair+risk+assessment+methodology+pdf
    • https://static.usrfiles.com/ugd/3e0cb9_6f9fb3f5836e48698d9c0b29c23852cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a9b832ce99c473fb8a95568f8a7f68f.pdf
    • https://static.usrfiles.com/ugd/eb4c03_65355c16a59c45b2b599f2991ee121b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_8561ea4ef212406ea4f6aa3007d15b07.pdf
    • https://static.usrfiles.com/ugd/b8c837_175f96dd976f40d58580415c47c74b16.pdf
    • https://static.usrfiles.com/ugd/e643da_0f637126ee5043ceb429ac4a1f8cac4f.pdf
    • https://static.usrfiles.com/ugd/696b8a_26da77717fed408caa3a6c3553e437c5.pdf
    • https://cdn.shopify.com/s/files/1/0440/3704/6422/files/59941770971.pdf
    • https://cdn.shopify.com/s/files/1/0432/7453/5067/files/39509114195.pdf
    • https://cdn.shopify.com/s/files/1/0433/4750/9416/files/sobuvo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/gipolekubusobegabojave.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xazijejizamoketabuguta.pdf
    • https://cdn.shopify.com/s/files/1/0465/0785/1926/files/45512888652.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_off00007789.bin
f95e70eeb247c5285cdeab1c352512f8d37ce3fecf3661a7db9211ba38578354		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7789 5576 bytes
font_01_sfnt_off00008a69.bin
2afb900e699f0757e3c6446078a38103a8354ed6cf77368f71326e9e83053569		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A69 10636 bytes

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