Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee1e5eeb4617772…

MALICIOUS

PDF

44.2 KB Created: 2020-08-29 21:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab113f9050acb60e9e624090d25e7697 SHA-1: a09656d8297ebf0fc39ce6f2626616ac60dec63c SHA-256: dee1e5eeb4617772c19ca55ae20c9a2192d3528b72b6890ac8912ea977d867e1
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, specifically pointing to 'https://ttraff.cc/wix?keyword=imprimir+un+arreglo+en+c'. This URL is embedded within the document body, suggesting an attempt to trick the user into visiting a malicious site. The presence of numerous other PDF links, while mostly benign, indicates a link farm strategy. The ML classifier also strongly flagged this PDF as malicious.

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.cc/wix?keyword=imprimir+un+arreglo+en+c
    • https://cdn.shopify.com/s/files/1/0431/9926/6979/files/www._nvsp._in_form_6_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6556/files/bafefefeti.pdf
    • https://cdn.shopify.com/s/files/1/0438/3562/1536/files/chauvet_high_performance_fog_fluid.pdf
    • https://cdn.shopify.com/s/files/1/0459/7494/5959/files/sticker_whatsapp_pubg.pdf
    • https://static.usrfiles.com/ugd/db1da1_0781126134524945ba2c5fc310823848.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8e06fc5fe7142e8833420b4b276a4ec.pdf
    • https://cdn.shopify.com/s/files/1/0436/0732/6882/files/rofitojunogelozijabixul.pdf
    • https://cdn.shopify.com/s/files/1/0435/1095/6196/files/parepurete.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6421/files/mamovumuzidukew.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/bogufegigug.pdf
    • https://cdn.shopify.com/s/files/1/0432/4150/4927/files/63854319180.pdf
    • https://cdn.shopify.com/s/files/1/0450/7946/2040/files/astronomy_articles.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/74346409932.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_off00005596.bin
065444f7a4f6e04d2783af80ef2808403a5bada083c00c12b522f3cbb3c2e618		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5596 4812 bytes
font_01_sfnt_off000065c5.bin
c61b6a6c288e2841b76056c70eb66b75032eb6531dba1dc39dc1d2b9147e04f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C5 15576 bytes
font_02_sfnt_off000094f1.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94F1 4324 bytes

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