Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e9b2d46741b4cd9…

MALICIOUS

PDF

50.3 KB Created: 2020-08-04 03:40:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4192a476c9472f7ae8aaf0f38db0bac2 SHA-1: b5c6c98583054fb474af18391f19547312c6938d SHA-256: 9e9b2d46741b4cd989cd0863d5c6e399fd0ed9476ed26119509b08aada244b4c
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with the primary heuristic identifying a malicious redirector. The document body is heavily obfuscated, but the presence of the URL 'https://ttraff.ru/pify?keyword=calcestruzzo+armato+pdf' strongly suggests a malicious intent to redirect users to harmful content. The file also exhibits characteristics of a link farm, further supporting the attack pattern of distributing malicious links.

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.ru/pify?keyword=calcestruzzo+armato+pdf
    • http://files.carolinastormhedgehogs.com/uploads/1/3/1/6/131637291/fanipewonosewagafuv.pdf
    • http://files.benedictionworks.com/uploads/1/3/0/8/130813782/6904961.pdf
    • http://files.volkerspatchcollection.com/uploads/1/3/0/8/130874122/zuvilipowikogu_kinigura_ratiwole.pdf
    • http://files.futbolpapa.com/uploads/1/3/1/4/131406811/gejax.pdf
    • https://cdn.shopify.com/s/files/1/0431/2042/7157/files/sofupojim.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/rikezusulo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/lizerovevumoga.pdf
    • https://cdn.shopify.com/s/files/1/0435/3880/8991/files/99139266231.pdf
    • https://cdn.shopify.com/s/files/1/0431/6345/1560/files/japarifukokirezujoporox.pdf
    • https://cdn.shopify.com/s/files/1/0431/8085/1364/files/49985396339.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7300/files/40106993878.pdf
    • https://cdn.shopify.com/s/files/1/0436/6503/1321/files/bupezasipuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9621/files/zalimukemibonupadixirane.pdf
    • https://cdn.shopify.com/s/files/1/0437/2597/9813/files/folevawusutade.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_off00007129.bin
dfd68963598182eeeb33fd6814b0b0daa7a35141e8c370661d11de01b9f121b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7129 5256 bytes
font_01_sfnt_off000082f4.bin
42642e1614c3204ac7c36ae9adf7b6cc57cb3516239577f46977dc7f1144dd4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82F4 11044 bytes
font_02_sfnt_off0000a6d1.bin
37bd064822a4139c5d8e3cdb2e2dd8d0ae9d956962f76839c9edaf1267f3d3f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6D1 16244 bytes

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