Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5aa2c532ce63f0d…

MALICIOUS

PDF

96.5 KB Created: 2020-08-19 08:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba865cb0d1d292ed27b7d0754efcdd68 SHA-1: a95158768584a946cbebeb610a821898c3831163 SHA-256: f5aa2c532ce63f0d52c5bfb09091d3a299909d7af9b026b394ad4f7324168597
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL that is used in the lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, suggesting a link farm or redirection strategy. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious classification.

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.ru/pify?keyword=hitchhiker%2527+s+guide+to+the+galaxy+series
    • http://jawazib.desertdairy.com/uploads/1/3/1/8/131856706/dovejulumobizidet.pdf
    • http://files.lizboultonart.com/uploads/1/3/1/4/131483147/c62825af.pdf
    • http://files.beantobar.ch/uploads/1/3/1/4/131406518/dibubaxano.pdf
    • http://files.shortsalesuccessna.com/uploads/1/3/1/3/131379761/pigopaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/9826/7029/files/lofejokobikatewupores.pdf
    • https://cdn.shopify.com/s/files/1/0434/9467/0498/files/difemefu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0791/files/4764276958.pdf
    • https://cdn.shopify.com/s/files/1/0431/4536/3616/files/64142749658.pdf
    • https://cdn.shopify.com/s/files/1/0434/4227/4454/files/css_table_background_color.pdf
    • https://cdn.shopify.com/s/files/1/0430/6403/3429/files/suseregubenepub.pdf
    • https://cdn.shopify.com/s/files/1/0431/0063/5290/files/genero_dramtico.pdf
    • https://cdn.shopify.com/s/files/1/0427/5883/2294/files/kibofawidilibotakatifamir.pdf
    • https://cdn.shopify.com/s/files/1/0437/9472/7069/files/vuxiperadarinezaradukuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/0927/7095/files/87857647768.pdf
    • https://cdn.shopify.com/s/files/1/0437/5196/4830/files/kigejowosuvaxinanowob.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_off00013d04.bin
16eae9615d51e375bea97139fa3f77697d91614f9be60c1d54e36c75ee92e208		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D04 5432 bytes
font_01_sfnt_off00014f7c.bin
9c6923d3b5640bd035497cb4b3904d9517a851e3e32f7de691984258d01b961f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F7C 10852 bytes

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