Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a4329eae127f814…

MALICIOUS

PDF

36.9 KB Created: 2020-08-31 03:22:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72b70c7cc4d65438786f4d9fa5b58f71 SHA-1: 35c2a7e0edf8cb2ca75629c260835e017a2b2e3f SHA-256: 9a4329eae127f8149a06369c455aa8f268ba969fa7bd5c91aaf30e68098f1ddd
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used for SEO poisoning or to redirect users to malicious websites. One of the primary links, 'https://ttraff.com/wix?keyword=swingers+club+knoxville+tn', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL and other PDF links, reinforcing the link farm heuristic.

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.com/wix?keyword=swingers+club+knoxville+tn
    • https://static.usrfiles.com/ugd/906e9f_3154adbd6de84c468480c6d4bdaccc6c.pdf
    • https://static.usrfiles.com/ugd/33a2e4_610f545256f145198dbb0d73cc013260.pdf
    • https://static.usrfiles.com/ugd/15ebe2_f04ac250d5384eeaa3f450b485a850f0.pdf
    • https://static.usrfiles.com/ugd/0c4177_27cd6891708048a6910b6c1ef9a84ddd.pdf
    • https://cdn.shopify.com/s/files/1/0431/1000/6940/files/9356729758.pdf
    • https://cdn.shopify.com/s/files/1/0433/5665/1669/files/ansys_classic_commands.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/ramilotes.pdf
    • https://cdn.shopify.com/s/files/1/0431/1675/7153/files/528236354.pdf
    • https://cdn.shopify.com/s/files/1/0431/4071/0566/files/42843157122.pdf
    • https://static.usrfiles.com/ugd/b8c837_5641c77eac2545e785ae90322ad21e0c.pdf
    • https://static.usrfiles.com/ugd/739437_215a7a537eaa43f1acb1424c3c7873b2.pdf
    • https://static.usrfiles.com/ugd/d4da64_e4bfc7e42c8447f68216cc966469e709.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b4d2f54a45f4482b425ffd9f1605dfa.pdf
    • https://static.usrfiles.com/ugd/dd4472_8bacfd7ceba74396a777dd1e72ba3fe3.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_off00005283.bin
2a9fb1deed552f385b81d6235528de55a490b31dfc660d203c390a7f520a749f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5283 5284 bytes
font_01_sfnt_off000064a5.bin
9f6340e94c3d35b7a2b39bd2281983cfa7690e37383d24495299f862ff9ea27d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A5 10152 bytes

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