Malicious PDF — malware analysis report

Static analysis result for SHA-256 9abe8d76fd8633b0…

MALICIOUS

PDF

65.7 KB Created: 2020-09-01 05:10:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d9155bf2a6d9cf5a6d45d015013c37e SHA-1: f600b0b274b3fe0dd5b23923e394db6c1e22ea4b SHA-256: 9abe8d76fd8633b0feb6b4db5d8b720218985d1e8b0ff63506a5d279ce0a89c5
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs. One prominent URL, 'https://ttraff.ru/wix?keyword=herbert+blumer+symbolic+interactionism+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting it is the primary lure. The presence of multiple external links points towards an attempt to direct users to potentially harmful content.

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=herbert+blumer+symbolic+interactionism+pdf
    • https://static.usrfiles.com/ugd/0ad6c7_6b41d73f9fb54543bbbd1e88fe6a8f8a.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f949fd4c32245dea35cfdcd393a6c3a.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f4e713ba6c54bd5b425813e8a49d5f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a12b8c2a6b14c78b162a8183953af0f.pdf
    • https://static.usrfiles.com/ugd/5360f8_a4eec92b5794418a92913e29c3710045.pdf
    • https://static.usrfiles.com/ugd/b8c837_e6107023b70e4a7ea57c0ffb23a090bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_643fd96829174a5bada6054e7027b46e.pdf
    • https://static.usrfiles.com/ugd/3615fb_f2d7b909f8474898a84abccae29d7946.pdf
    • https://cdn.shopify.com/s/files/1/0428/7715/7542/files/wokojawe.pdf
    • https://cdn.shopify.com/s/files/1/0431/0971/2021/files/57525469891.pdf
    • https://cdn.shopify.com/s/files/1/0431/5522/6773/files/adobe_acrobat_editor_free_download_for_windows_7_32_bit.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5400/files/kwela_kwela_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/spacing_in_latex.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_off0000c341.bin
b191ba72a0da5a6840dd9885b6ae6e2823cd22aa90e55167c01a7c9d66a6d281		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC341 5504 bytes
font_01_sfnt_off0000d5e4.bin
b71fb995a4f1f76691112b18b02f91127ed72d62b97e6f591ac45e736370a8fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E4 10688 bytes

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