Malicious PDF — malware analysis report

Static analysis result for SHA-256 99b1deed9db29e51…

MALICIOUS

PDF

49.4 KB Created: 2020-09-01 11:31:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84ceeb5e8ec9df30188c9a488c11c4b6 SHA-1: 339b49995dd2a06e5ac4a7b1476d061f87128e89 SHA-256: 99b1deed9db29e515396530964048b5b2eb1f2dc2a457b280ef7ded7b03384fe
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a lure for an application form with an implied deadline, encouraging the user to click a link. This link redirects to 'ttraff.cc', which is flagged as malicious. The document also contains a large number of links to 'static.usrfiles.com', many of which are benign, but the overall structure suggests a link farm used to obscure the malicious redirector. No scripts were extracted, but the PDF structure and malicious redirector link strongly indicate a phishing or redirection attack.

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.cc/wix?keyword=b+ed+cet+2019+application+form
    • https://static.usrfiles.com/ugd/b8c837_0e384b9c7a9c4e21b02b4c9a1b75ccd0.pdf
    • https://static.usrfiles.com/ugd/b8c837_09eb44ff6261448a9168e17322fdcf36.pdf
    • https://static.usrfiles.com/ugd/b8c837_c92483f654da4abebf15557d295bfa6a.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_1b5875498c464687bb0eaf0784e6796d.pdf
    • https://static.usrfiles.com/ugd/07625c_4a36ff73d5a3417195bd8227285740dd.pdf
    • https://static.usrfiles.com/ugd/6c98bc_692ffb6a9c9546e2b6a0e4949dd233b3.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_adb73df76f904140932f94718000ab0a.pdf
    • https://static.usrfiles.com/ugd/834936_18108b3882c341b0ba0f58be64f31929.pdf
    • https://static.usrfiles.com/ugd/e745be_ea03b568e2894bff8fcef9b4becd69ef.pdf
    • https://cdn.shopify.com/s/files/1/0429/9273/0275/files/suxexoxikezemogepiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8967/3883/files/lavavewuzugimot.pdf
    • https://cdn.shopify.com/s/files/1/0438/4810/6134/files/analyzing_data_worksheet_mouse_experiment.pdf
    • https://cdn.shopify.com/s/files/1/0429/0448/6055/files/12664491606.pdf
    • https://static.usrfiles.com/ugd/a43ec6_407c282ce78c45e3ac04b73c58e4d6c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_7eb12e43ac1a4dfba1729cfb09986dba.pdf
    • https://static.usrfiles.com/ugd/19103d_0e8e142d0ae64b15a9496b5f10ac7a36.pdf
    • https://static.usrfiles.com/ugd/43d598_dea6057ad23a426683ab0b2c73719d19.pdf
    • https://static.usrfiles.com/ugd/b4f0c6_d880d23404e94811b2f6557bc802520b.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/
    • https://static.usrfiles.com/ugd/b4f0c6_d

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081b0.bin
9c17e0dae42f59ae958d34754bf1be18395ccf190aa601e0279846a9f3b8f886		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81B0 5656 bytes
font_01_sfnt_off000094db.bin
c18efe5c70f5589c9941b1a386903df970f30418e4fce3a32ee033c68d0988e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94DB 10552 bytes

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