Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe8f52a9b672732c…

MALICIOUS

PDF

38.6 KB Created: 2020-08-31 01:19:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 786664b3e78dd02d8f8ddddf09394f9e SHA-1: 8d45638c76841d71bb1dfb87c2ef6775c8fd4967 SHA-256: fe8f52a9b672732c5a340351087210ce3bb0b54fa3fe0bea37fd2afede7f122f
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to a known malicious URL. Additionally, the PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external PDF links, likely part of a link farm. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content. No scripts were extracted from this sample.

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=radical+self-acceptance+a+buddhist+g
    • https://static.usrfiles.com/ugd/a01749_8f71fbf7e38d43238b2e8cb37aab6d87.pdf
    • https://static.usrfiles.com/ugd/a298ce_b00973d0fff44882a1f911290c1de352.pdf
    • https://static.usrfiles.com/ugd/69b86f_4d19caa9546647eda73dcd12680bd6a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0f40f6d51cd4ed3a4cd5aecdc74f11a.pdf
    • https://cdn.shopify.com/s/files/1/0437/0399/2485/files/ascendant_divergent.pdf
    • https://static.usrfiles.com/ugd/defcb2_ddc092bbe7424d65ba507ecd3d06b05a.pdf
    • https://static.usrfiles.com/ugd/f967ac_4db7ba187ee44dd39b8b4ef8d19bf477.pdf
    • https://static.usrfiles.com/ugd/b88e3d_99afb3f2b7654229b9d3ad1eaef5ef70.pdf
    • https://cdn.shopify.com/s/files/1/0433/4885/2891/files/63220494062.pdf
    • https://cdn.shopify.com/s/files/1/0433/9875/8557/files/briggs_and_stratton_repair_manual_download_free.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_off000057e5.bin
c4e78b766c8ecf3ee98af67bbf67c25b80033bf718a8fe58e00a783d3b25e912		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57E5 5500 bytes
font_01_sfnt_off00006a97.bin
16db8945b49d7d8f41ee58be53458170be84e08b455da7e4c3528b183f8fe737		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A97 10412 bytes

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