Malicious PDF — malware analysis report

Static analysis result for SHA-256 db6a4cfe8444e6a6…

MALICIOUS

PDF

32.3 KB Created: 2020-08-30 23:33:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc56ffee38a43470b211beba88fa48d9 SHA-1: 4e5e64d3640420656cda00d5d7adeb2d58534e3a SHA-256: db6a4cfe8444e6a60298e7defb51532cb5bc3aa9846da46294d3b874fd61ca52
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=1on1+basketball+games+unblocked'. This URL is presented within the document body, suggesting a social engineering lure. Additionally, the PDF exhibits characteristics of a link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0437/5894/4405/files/78306263189.pdf'. 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=1on1+basketball+games+unblocked
    • https://cdn.shopify.com/s/files/1/0437/5894/4405/files/78306263189.pdf
    • https://cdn.shopify.com/s/files/1/0430/9375/4009/files/novirepikegez.pdf
    • https://cdn.shopify.com/s/files/1/0428/4160/4263/files/xetasuwa.pdf
    • https://cdn.shopify.com/s/files/1/0428/6296/8991/files/binomial_distribution_examples.pdf
    • https://cdn.shopify.com/s/files/1/0428/4393/0791/files/83244399197.pdf
    • https://cdn.shopify.com/s/files/1/0429/2991/4012/files/tratado_de_direito_penal_bitencourt.pdf
    • https://static.usrfiles.com/ugd/739437_b894ac2634dd47cb9cdd999ec15b0f84.pdf
    • https://static.usrfiles.com/ugd/0047a4_684de0de53fa43ddbbe67aa81ddb2ac2.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/garese.pdf
    • https://cdn.shopify.com/s/files/1/0434/8795/3053/files/zirejaronina.pdf
    • https://cdn.shopify.com/s/files/1/0435/0859/6900/files/98921991231.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/oxford_discover_4_student_s_book_free.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_off000042f6.bin
c98718e1240ae4197ed8d19689855056bc45165a8c939345d74f2e379d78f553		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42F6 5324 bytes
font_01_sfnt_off00005504.bin
ca9b39f3b2fe99ecb6eec91232f67406044f529ec0cef61e42b00d03934c97a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5504 9564 bytes

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