Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec7dd4e55e881328…

MALICIOUS

PDF

43.7 KB Created: 2020-08-29 21:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f428e86591e78daaa33c259e0a632d4 SHA-1: 0e3c9a27558ba7d5361483267bc4750d9ff607c2 SHA-256: ec7dd4e55e8813285b175beafec14244536f395fd4a6146c08a25dc800be84c1
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=maytag+centennial+washer+manual'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including 'https://static.usrfiles.com/ugd/b8c837_c5457d31b2ec4059a31b98aa8781f0d3.pdf'. The document body, though heavily obfuscated, contains references to a washer manual and the malicious URL, suggesting a lure to a malicious site.

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=maytag+centennial+washer+manual
    • https://static.usrfiles.com/ugd/b8c837_c5457d31b2ec4059a31b98aa8781f0d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe0c71f602e84a35953333d0cf281f1d.pdf
    • https://static.usrfiles.com/ugd/b8c837_0887dcaaabfa42f485b4679c9130eee4.pdf
    • https://static.usrfiles.com/ugd/18f527_63c8a478d7454c5e8d56dc94ad487b83.pdf
    • https://static.usrfiles.com/ugd/b8c837_c336f6b72fef46c2bcc4e53015fc24bc.pdf
    • https://static.usrfiles.com/ugd/bf650e_c243ce50fdbf4580acdd6618d92ef817.pdf
    • https://cdn.shopify.com/s/files/1/0431/2691/5239/files/84103394180.pdf
    • https://cdn.shopify.com/s/files/1/0434/1163/6381/files/puburizinekalixa.pdf
    • https://static.usrfiles.com/ugd/b8c837_b4904fb0ba084e1d9d91f1739727aeed.pdf
    • https://static.usrfiles.com/ugd/b8c837_369be3c04a034272b99533d926e64fe8.pdf
    • https://static.usrfiles.com/ugd/b8c837_58ab13cd913f46148ffee3d58e94a141.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd8cb8e1c4cd4295b0317805ad0c1e85.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_off00006b01.bin
4ffb833287fb45a0f1b8d5444e450a36c4368d98579c6fb8069476142b26b6be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B01 5412 bytes
font_01_sfnt_off00007d55.bin
aab6a5f642c3f6358e90b9bf61cedc969bdc6f9725ffb3b94049b43fd0c6045a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D55 10756 bytes

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