Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc48dbc144d1d57c…

MALICIOUS

PDF

47.0 KB Created: 2020-09-01 18:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 940a6f2e19153c10d7e579b0ce7b7a5f SHA-1: e1611a3f68d28d54531801fb8e89721f9a710fc2 SHA-256: fc48dbc144d1d57cf202b8aa83718670fcca8a7df7400d70ed2ec7cccf332ca3
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=gaap+accounting+balance+sheet+sample'. This indicates an attempt to direct users to a harmful site, likely for phishing or malware distribution. The document also contains a PDF link farm heuristic, suggesting a broader effort to distribute malicious content. The presence of embedded URLs and the overall structure point towards a social engineering attack.

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.cc/wix?keyword=gaap+accounting+balance+sheet+sample
    • https://static.usrfiles.com/ugd/c618e9_78be48f5c56b4713a4c6f442ba296c1a.pdf
    • https://static.usrfiles.com/ugd/704566_842917fae7cb4caabf5c7dbc3aa81a08.pdf
    • https://static.usrfiles.com/ugd/4d935e_6e4af42724294db4bcd75041d1e54024.pdf
    • https://static.usrfiles.com/ugd/b4f0c6_03bd80b573854579ab11f72914e22746.pdf
    • https://cdn.shopify.com/s/files/1/0440/2321/8341/files/wakfu_donjon_wabbit.pdf
    • https://cdn.shopify.com/s/files/1/0436/6827/5353/files/gndu_date_sheet_ba_5th_sem_2019.pdf
    • https://static.usrfiles.com/ugd/9219f8_5380ea2357f9443eb85f08c44cf7678a.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea18c6f43d984f198b1cf0c001dc39e2.pdf
    • https://cdn.shopify.com/s/files/1/0434/2448/1431/files/mubonus.pdf
    • https://cdn.shopify.com/s/files/1/0437/7011/8306/files/exchange_activesync_on_android_not_working.pdf
    • https://cdn.shopify.com/s/files/1/0433/7975/3109/files/25500980416.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_off00007842.bin
a6131b7f4307d8fa190cb40ce908d6b8b75e83ab51fdcc9044b9ea398e082d1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7842 5420 bytes
font_01_sfnt_off00008a8c.bin
144e98383d35963321791e54409659c2ad5b747df6017b9582c1da4be0552b73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8C 10704 bytes

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