Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c82af2df46210ce…

MALICIOUS

PDF

85.0 KB Created: 2020-08-21 01:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9105d1de44f4aabe1f41d6bfc21be11 SHA-1: 18e66c3871508d5b4053f618eabdc00b54f73f05 SHA-256: 2c82af2df46210ce3649d19a9ebe639bcaed1abf9770df911007931bb837b6f9
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.cc/pify?keyword=list+of+anticoagulants+pdf'. This suggests the document's primary purpose is to redirect users to malicious infrastructure. The ML classifier strongly supports the malicious nature of the PDF. No scripts were extracted, limiting the analysis of specific execution behaviors.

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/pify?keyword=list+of+anticoagulants+pdf
    • http://files.indyofficelistings.com/uploads/1/3/1/6/131636807/763661.pdf
    • http://files.cirmass2016.org/uploads/1/3/1/4/131438869/8f60d045758.pdf
    • http://desizilo.lecheilety.com/uploads/1/3/1/3/131398575/savizidox.pdf
    • http://files.happyhousepreschool.org/uploads/1/3/2/6/132681767/281770.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6480/files/86566881040.pdf
    • https://cdn.shopify.com/s/files/1/0429/0543/6323/files/fawufisazegonexumabixo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4419/9829/files/broken_angel_whatsapp_status.pdf
    • https://cdn.shopify.com/s/files/1/0448/1892/3686/files/caryl_phillips_cambridge.pdf
    • https://cdn.shopify.com/s/files/1/0433/2421/1354/files/zejidabonifeniz.pdf
    • https://cdn.shopify.com/s/files/1/0448/9995/8939/files/tobenokulugaziporavurixi.pdf
    • https://cdn.shopify.com/s/files/1/0446/6517/6217/files/catatonia_treatment.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_off00011155.bin
405a43f4e836f5aafb8b7e56445cf8a3998b49d4bfea91b8dffa2bad12fd175d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11155 5168 bytes
font_01_sfnt_off000122fd.bin
a86931fb81bc2ef45a6296ee73dc44b25b142771cbe80898d6851f2be600bcec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122FD 10644 bytes

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