Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b99f8f68fd8d64b…

MALICIOUS

PDF

48.9 KB Created: 2020-09-02 05:26:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8202be8336fe4c03a24d3e1e407979c SHA-1: 9ca79631a8cd25833046d52b9161537545478b71 SHA-256: 3b99f8f68fd8d64b68a1e1896feb93d372d6800e855a8b9d2b61b84681cea073
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=inventory+management+report+excel'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many of which point to 'static.usrfiles.com'. The document body, though heavily obfuscated, contains text related to inventory management and the malicious URL, suggesting a phishing lure. No scripts were extracted from this sample.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=inventory+management+report+excel
    • https://static.usrfiles.com/ugd/b8c837_1fd86df1d45b439bb0196b904063b124.pdf
    • https://static.usrfiles.com/ugd/769f78_6eebb3ee9bbf49deb4312e93f172fa14.pdf
    • https://static.usrfiles.com/ugd/b8c837_c60a33eac6584991969a75197cdb0190.pdf
    • https://cdn.shopify.com/s/files/1/0463/5803/6646/files/valkyrie_connect_mod_apk_revdl.pdf
    • https://static.usrfiles.com/ugd/df73ab_6aac15738d1049ecace86d6692ac1699.pdf
    • https://static.usrfiles.com/ugd/b8c837_77641a2efc10465395a98f9523659019.pdf
    • https://static.usrfiles.com/ugd/ab922d_23d105f4286c4781bec08267e649f3d6.pdf
    • https://cdn.shopify.com/s/files/1/0428/1221/1359/files/nfs_under_cover_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5611/files/82583743080.pdf
    • https://cdn.shopify.com/s/files/1/0430/7098/0247/files/myanmar_calendar_2018_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/7141/3160/files/47481863874.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074ae.bin
61f4471a75dc027e0d3a4138a63633d86c374364748180dd35b64769aa27d66e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74AE 4980 bytes
font_01_sfnt_off00008589.bin
8bc0b5175b6456639402b91c97e9806a6431a789fa51081ef08ad780c70e1069		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8589 10364 bytes
font_02_sfnt_off0000a8f8.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8F8 4324 bytes

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