Malicious PDF — malware analysis report

Static analysis result for SHA-256 44d2ba6b3d6f2ef4…

MALICIOUS

PDF

33.4 KB Created: 2020-08-30 19:02:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c8e8c72aa854bd51eb7c06a1383062f SHA-1: 462998406ca712afd9f9166cc9ade8899e197dea SHA-256: 44d2ba6b3d6f2ef449c22a0e1a248ca36f425f8984979bd34b8494d7923e6f62
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1200 Hardware Add-in

The PDF file exhibits characteristics of a link farm, embedding numerous external URLs. One of these URLs, 'https://ttraff.ru/wix?keyword=ver+masacre+en+texas+herencia+maldit', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other links, suggesting the primary intent is to lure users to malicious sites. No scripts were extracted, and the document body's content is largely unreadable, but the heuristic firings strongly indicate a malicious redirection scheme.

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=ver+masacre+en+texas+herencia+maldit
    • https://static.usrfiles.com/ugd/b8c837_bdba102466e944d28201341681839255.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbbfd0603f3e4887bbdb92b5c4ab1d31.pdf
    • https://static.usrfiles.com/ugd/097bd5_4f8d938bff7f49fda4458761e8cbddfc.pdf
    • https://static.usrfiles.com/ugd/b8c837_0003321d600c4ca7967a273a0d5821d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_7b0858a8111249ca9bf11a06f1dafa58.pdf
    • https://cdn.shopify.com/s/files/1/0430/3588/5725/files/66579685070.pdf
    • https://cdn.shopify.com/s/files/1/0469/0444/3040/files/rotijekepubokotutipej.pdf
    • https://static.usrfiles.com/ugd/b8c837_db4d21784f024377b6338dbf6a7ed39a.pdf
    • https://static.usrfiles.com/ugd/c8a981_e0089cde6bbd489992e52568b43d9133.pdf
    • https://cdn.shopify.com/s/files/1/0440/2790/4165/files/9423988928.pdf
    • https://cdn.shopify.com/s/files/1/0440/5123/4981/files/angular_6_template_switch.pdf
    • https://cdn.shopify.com/s/files/1/0430/9218/1153/files/67041511218.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_off00004383.bin
60073af1fd1dd0c605ee20406b11624d1a9a05c000bbf6f0c2066d5ea4386ffa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4383 5212 bytes
font_01_sfnt_off00005503.bin
b07645bc9946b9c2b0097d534801024a98bb4e895619fa4446841fe35d42c650		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5503 10560 bytes

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