Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb522d751f30cc57…

MALICIOUS

PDF

39.9 KB Created: 2020-09-04 22:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a6af15c1c449902e43a01559bca7281 SHA-1: 841bb5305c09d3a56cd6ac7c82a041888c4c892f SHA-256: eb522d751f30cc57a40a4c72fc08d99d538166e6928bb096caeb89a11324cff8
120 Risk Score

Malware Insights

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

The PDF document contains a mass external link farm, with a primary link pointing to a known malicious redirector. The redirector URL is 'https://ttraff.me/pify?keyword=certbot+manual+dns+wildcard'. This indicates the document is designed to lead users to malicious sites, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure and embedded links strongly suggest a malicious intent.

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.me/pify?keyword=certbot+manual+dns+wildcard
    • https://static.usrfiles.com/ugd/83b1b3_90b18ff128f54a84be9b932cc28bf33d.pdf
    • https://static.usrfiles.com/ugd/8ba634_dceb1b7ad4234daa81c29a90f015f397.pdf
    • https://static.usrfiles.com/ugd/19ce5d_7dc602de2ef24679b19d8fa4d9d2503e.pdf
    • https://cdn.shopify.com/s/files/1/0429/7388/8671/files/viragumibowegerom.pdf
    • https://static.usrfiles.com/ugd/b8c837_61aa954e9a2c416e8cf530f4bbf5c2ce.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_2b0a18e63eb04d789648d743f0e61287.pdf
    • https://static.usrfiles.com/ugd/3e9e83_a4a56acd199547379186e6e37e938cd8.pdf
    • https://static.usrfiles.com/ugd/4e6dd5_279ae229d79342bfa43304b1d34f5d78.pdf
    • https://cdn.shopify.com/s/files/1/0427/3173/3159/files/33898663021.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/tesuxu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1969/6290/files/aicp_certification_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0448/2806/5949/files/arduino_language_reference_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/6503/3383/files/97132098831.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_off00006011.bin
63d74a351f47fe7ea61d84afd5847647108c2a798a14fd4c3975ba043d821024		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6011 5224 bytes
font_01_sfnt_off000071be.bin
609b20232837c44abeaff388da372e83c6b2ff747b83f3d7292574b14d41e178		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71BE 9808 bytes

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