Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca84b172e9b48cc9…

MALICIOUS

PDF

42.8 KB Created: 2020-09-03 08:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2234424aa9db792deea016eef144ba9 SHA-1: 93b88efe0b4ad2602fe4c60cc83acec067c9d14b SHA-256: ca84b172e9b48cc99fa3a4093a0ecc7642ffbbead52301f883f01fa3d4ba344c
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=anafranil+bula+pdf'. This indicates the document's primary purpose is to redirect users to potentially harmful content. Additionally, the PDF was flagged as a link farm, suggesting an attempt to manipulate search engine results or distribute links to various malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/wix?keyword=anafranil+bula+pdf
    • https://static.usrfiles.com/ugd/9219f8_35802a228fe14fa98c9085c3375e5cdb.pdf
    • https://static.usrfiles.com/ugd/1cc777_5c09f5dde53b45a19e428de42e4685bd.pdf
    • https://static.usrfiles.com/ugd/bdeb4c_fc81637888b842d4afc6e6325e9c2edd.pdf
    • https://cdn.shopify.com/s/files/1/0435/8383/2227/files/mil_canciones_andres_cepeda.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13170590630.pdf
    • https://cdn.shopify.com/s/files/1/0441/2506/1272/files/45404600488.pdf
    • https://static.usrfiles.com/ugd/50de67_9243f39de2984d60ae10ecf5ca7d6ad5.pdf
    • https://static.usrfiles.com/ugd/b8c837_a36c8583f62e4a5581e4a3c14d6868a1.pdf
    • https://static.usrfiles.com/ugd/edb4a7_4276a3709234470299a2ed9888c4e43a.pdf
    • https://static.usrfiles.com/ugd/87fdc7_f93381fb660d4862a866d8b67e15bddc.pdf
    • https://static.usrfiles.com/ugd/078c79_355eb56189b7431aac9aa527df0169db.pdf
    • https://static.usrfiles.com/ugd/cece23_75c3beb0499f4166b762782ba9f43bd2.pdf
    • https://static.usrfiles.com/ugd/a07927_f5eb9bb907354ff1bf029abf30b96ee4.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_off00006b73.bin
e6295da9a47a88960262f0b2b9eee38a446936fdb0ddcd4312e86daf546ad8c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B73 4984 bytes
font_01_sfnt_off00007c6d.bin
0ef6856b2764135c126be0e43fee7a6307b764c68579d2a8e0871756560737f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C6D 10164 bytes

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