Malicious PDF — malware analysis report

Static analysis result for SHA-256 e28f444003571b11…

MALICIOUS

PDF

52.5 KB Created: 2020-08-31 23:08:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: feff50e769bc7ba18ef5527ffda584e8 SHA-1: 8f85e68f7961a0abea59dcfc8af03584f6799995 SHA-256: e28f444003571b1187543dd4a584be7d24b9ed8e9fca977755602065977e9f38
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 malicious infrastructure. Additionally, PDF_SEO_LINK_FARM indicates the document is part of a link farm designed to attract traffic. The embedded URL https://ttraff.cc/wix?keyword=atolls+are+formed+by is the primary malicious redirector identified. The document body, though heavily obfuscated, contains this URL, reinforcing its role in the attack.

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.cc/wix?keyword=atolls+are+formed+by
    • https://static.usrfiles.com/ugd/b8c837_cd5ef37642bc4873ac13c8510e4a1d63.pdf
    • https://static.usrfiles.com/ugd/162fe6_409bd96ed40a410d8e51089e821b9c20.pdf
    • https://static.usrfiles.com/ugd/09c3c7_ad765d4bab974db3a1f64e925f144ea0.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec7a96251c714a79ae3c8e2f5075f113.pdf
    • https://cdn.shopify.com/s/files/1/0432/7368/3112/files/jifogukopiwexomipojajobo.pdf
    • https://static.usrfiles.com/ugd/fa32a6_c79f8eb8f1e14da7a3c7c5d041ebd24f.pdf
    • https://static.usrfiles.com/ugd/b8c837_0855aecdad9f4b0aa0a1147d93c609aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c7dd89e9dab43968eb089672b0031c8.pdf
    • https://static.usrfiles.com/ugd/d01287_be923317a9554fdd916ffac5d0f81532.pdf
    • https://static.usrfiles.com/ugd/e3325f_c9a5eaec187948058dd250b376d15ab3.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/tunozovovuburesupeloforev.pdf
    • https://cdn.shopify.com/s/files/1/0431/6204/2529/files/bekhayali_lyrics_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/3989/1357/files/arkansas_river_co_fishing_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/3525/5203/files/check_whether_homebrew_is_installed.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_off00008e2a.bin
b01acb99039d64326df67f31ad2e73072a5b6efcd018fcd17b762ec1d945e667		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E2A 5284 bytes
font_01_sfnt_off0000a012.bin
192be1134fe83b45755e6d6003e34aacae3c6d52dcd800c73bf1e474dff1a4d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA012 11076 bytes

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