Malicious PDF — malware analysis report

Static analysis result for SHA-256 f87754e877c71923…

MALICIOUS

PDF

39.3 KB Created: 2020-09-06 02:40:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b319bb50eefc1a54ce3cfe0a9ec5b1af SHA-1: 66d805677977488dffb1da1b4c4deec96bb7cdd7 SHA-256: f87754e877c719238008c80809038acb2d73e769412640563dc9979ef8a8177e
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.club/wix?keyword=ccleaner+portable+32+bit'. This URL is presented within the document body, suggesting a social engineering lure to trick users into downloading potentially malicious software. The PDF also contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm used for SEO poisoning or distributing malware. No scripts were extracted from this sample.

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.club/wix?keyword=ccleaner+portable+32+bit
    • https://cdn.shopify.com/s/files/1/0431/5827/4205/files/rafiwexafixaberox.pdf
    • https://cdn.shopify.com/s/files/1/0436/2685/6610/files/55401701984.pdf
    • https://cdn.shopify.com/s/files/1/0430/7147/1767/files/93567837857.pdf
    • https://cdn.shopify.com/s/files/1/0435/1167/7083/files/akc_pet_insurance.pdf
    • https://cdn.shopify.com/s/files/1/0432/7528/8742/files/file_names_into_excel_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/6410099870.pdf
    • https://cdn.shopify.com/s/files/1/0432/1764/9819/files/kifuxepafoba.pdf
    • https://cdn.shopify.com/s/files/1/0428/4376/6950/files/payback_period_example_problems.pdf
    • https://static.usrfiles.com/ugd/b8c837_fde285ca2f0545b58b282b894a371ec7.pdf
    • https://static.usrfiles.com/ugd/5e81b9_4cead292df5641f18d36b3e1dc2ec127.pdf
    • https://static.usrfiles.com/ugd/271e65_ea83082235774ebe9f4bb9345a536b59.pdf
    • https://static.usrfiles.com/ugd/99afdc_126f43a6e34243ac83c9343873e98151.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_off00005cda.bin
470ea77f2c50f2f36a9fd74ab0fc6faf7ada09e50ad1993e1ab78d04751e4336		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDA 5088 bytes
font_01_sfnt_off00006e2e.bin
c259fde6ebb53d34c72233c72a2d0affee47a29ce640ff6d04c9a72f773fbabd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2E 10156 bytes

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