Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1c323a5c3a3eb13…

MALICIOUS

PDF

40.9 KB Created: 2020-08-21 04:13:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 287a5df1bb0e4635f2cde4dd22491334 SHA-1: ef44f7dd6b8a18edc41b6cd1a7e76243ac791236 SHA-256: c1c323a5c3a3eb139833b24c546576641854ad35f7df03daaa83a9c74acdef90
210 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector pointing to 'https://ttraff.cc/pify?keyword=garena+authenticator+apk+free'. The document also employs social engineering lures, specifically a browser extension installation lure and an MFA/one-time-code harvesting lure, to trick users into clicking malicious links or divulging sensitive information. The presence of multiple PDF links and the redirector suggest a phishing or credential harvesting campaign.

Heuristics 6

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/pify?keyword=garena+authenticator+apk+free
    • http://files.deperehistory.org/uploads/1/3/2/3/132303099/luwukuvek.pdf
    • http://files.downingtownswimacademy.com/uploads/1/3/1/4/131453219/b58539fa67b0289.pdf
    • http://files.theverticalfiles.com/uploads/1/3/1/3/131398547/fivemimefuv.pdf
    • http://gaguxamep.fleurspressed.com/uploads/1/3/2/6/132696067/4703236.pdf
    • https://cdn.shopify.com/s/files/1/0432/8315/3056/files/tuwetibe.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/jomat.pdf
    • https://cdn.shopify.com/s/files/1/0435/3985/7572/files/99707655775.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/perefogobiduvekaso.pdf
    • https://cdn.shopify.com/s/files/1/0431/8553/7175/files/2300404947.pdf
    • https://cdn.shopify.com/s/files/1/0436/8757/5705/files/99520721934.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fixasitisajixumazurezeve.pdf
    • https://cdn.shopify.com/s/files/1/0433/4895/1194/files/duvorolurukotazozatedaru.pdf
    • https://cdn.shopify.com/s/files/1/0430/7573/1616/files/keboseworidafime.pdf
    • https://cdn.shopify.com/s/files/1/0462/7762/3957/files/vedewejojevob.pdf
    • https://cdn.shopify.com/s/files/1/0437/5393/0901/files/headway_elementary_fourth_edition_teacher_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/1959/7981/files/893656770.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_off00006229.bin
40e9cf333216399b367c6d491f2cba3251884dd198e9146225ac9981296c42c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6229 4988 bytes
font_01_sfnt_off0000731e.bin
cfc734ca0b386e031f708ebfd26095ef6bf4127845e055e4050f9293fe013b53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x731E 10420 bytes

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