Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f1c929c870cc275…

MALICIOUS

PDF

45.9 KB Created: 2020-08-30 13:19:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99380ca66d132cb19c0c064f63ef4f65 SHA-1: 6666858f4d7aea3f6f25fc0754e139e8b7285427 SHA-256: 8f1c929c870cc275d5d2ac916d98ae17b586ca3505c65f48ef928b55551419bc
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to a URL that impersonates a driver download. The document body also contains this URL, reinforcing the lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to static.usrfiles.com, which is flagged as a benign host. The primary malicious URL is ttraff.me, which is likely used to redirect the user to a second-stage payload.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.me/wix?keyword=p2+driver+mac
    • https://static.usrfiles.com/ugd/314c35_dea6bbf18f6f4c25b1a52444d0f1825d.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b07c5737e394be2a518881186bb99aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_49215ce896c84ea9bc3c71259407e086.pdf
    • https://cdn.shopify.com/s/files/1/0449/7945/4111/files/60573036200.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63529720688.pdf
    • https://cdn.shopify.com/s/files/1/0436/4291/2926/files/44846156025.pdf
    • https://cdn.shopify.com/s/files/1/0432/1191/5421/files/renewable_energy_sources_question_bank_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/5150/7094/files/23734862201.pdf
    • https://static.usrfiles.com/ugd/cdb50c_31eda7f13a9c47d2b4e437b782fe1c0c.pdf
    • https://static.usrfiles.com/ugd/eaf48f_bf445051aa824c6bbff93eb2e5fbe662.pdf
    • https://static.usrfiles.com/ugd/d775a9_426a5d223ccd478fbfda8573edb91487.pdf
    • https://static.usrfiles.com/ugd/b8c837_d31096489efc48f1ae5892255feb8075.pdf
    • https://static.usrfiles.com/ugd/b52961_cfac495fdff7423aa3ae6b290b120c97.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_off00006a4c.bin
d79fe05a21255e29401b8f240d8b40cba11dd805bedd71df91bc9f1b8cee04fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4C 5068 bytes
font_01_sfnt_off00007b70.bin
1fa5b76479ecd053497062f0795e38e25b13b0e6211219b33afe86c5028b274c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B70 15500 bytes

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