Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa1bc841e944d5e1…

MALICIOUS

PDF

37.7 KB Created: 2020-08-31 23:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26233cb051eddeeb355ef2428f1923e0 SHA-1: e8e0addd76defe512e891ec8a60af9112fcef66e SHA-256: aa1bc841e944d5e1003d4480abd9342706b18603b65cb2da619e7d2c749e9f73
102 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/wix?keyword=ringtone+song+music'. The document body, though heavily obfuscated, contains text related to 'Ringtone song music' and the authoring application 'wkhtmltopdf', suggesting a lure. The presence of a password-protected archive lure heuristic indicates that the user might be prompted for a password to access further malicious content, a common tactic to bypass gateway scanning.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=ringtone+song+music
    • https://static.usrfiles.com/ugd/b8c837_f5457bbe5509467abd543692feda57f7.pdf
    • https://static.usrfiles.com/ugd/cc14e4_852ef46bc092440d9b6ac23119a0e8d5.pdf
    • https://static.usrfiles.com/ugd/b11f6d_9f304141c2c145a08a175763a6f2ea3f.pdf
    • https://static.usrfiles.com/ugd/2813e2_8e18285fff454218b900adb5f17a803b.pdf
    • https://cdn.shopify.com/s/files/1/0435/0931/7787/files/69964248991.pdf
    • https://cdn.shopify.com/s/files/1/0429/7369/2063/files/barron_s_gre_vocabulary.pdf
    • https://cdn.shopify.com/s/files/1/0439/0469/6472/files/bukafujaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/4306/9858/files/platform_singer_with_himesh.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_off000058ac.bin
e49978ea9e724b9b268e8b71ed5de99f32ac7fac2bf8e062cf2b7cf453809565		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58AC 4788 bytes
font_01_sfnt_off000068fa.bin
44ed8536e3ccf691b160d00bb8a00dcd908789886a49818614dde6a0a9316ded		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68FA 9944 bytes

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