Malicious PDF — malware analysis report

Static analysis result for SHA-256 2de88f89aad7b641…

MALICIOUS

PDF

49.5 KB Created: 2020-09-07 21:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 002c55b8111e8950d5d9f4fdc5de7ac0 SHA-1: 505665ba3295ce80c56d922cd3ed6be4d61d8bb3 SHA-256: 2de88f89aad7b641528bf1f8fa5eeb29b93dd2865de6139a522e5f6286381cd4
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file exhibits characteristics of a link farm or SEO spam, with numerous embedded links to external PDFs hosted on Shopify. One of these links, 'https://ttraff.link/wix?keyword=bengali+baba+dj+song', is identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body contains garbled text but includes the malicious redirector URL.

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.link/wix?keyword=bengali+baba+dj+song
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/beckett_price_guide_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/jewuro.pdf
    • https://cdn.shopify.com/s/files/1/0429/5029/5708/files/kulexogukipozifuvog.pdf
    • https://cdn.shopify.com/s/files/1/0430/8130/2167/files/disable_compatibility_view.pdf
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/buwoboritajotukaxinaxirav.pdf
    • https://cdn.shopify.com/s/files/1/0429/3004/5084/files/6948648863.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6141/files/xizepajejuramososijoditir.pdf
    • https://cdn.shopify.com/s/files/1/0462/0019/3182/files/nififalomumen.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0138/files/81562348126.pdf
    • https://cdn.shopify.com/s/files/1/0430/3031/5159/files/commbank_home_loan_rates.pdf
    • https://cdn.shopify.com/s/files/1/0436/9160/6170/files/sena_10s_manual.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_off00007a02.bin
f45f03b1cc9b03ff818633ffadf9c5c6b96af84956199a2b4ce49e454e2b55d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A02 4872 bytes
font_01_sfnt_off00008a8e.bin
17fb816e1c807d71102330405458c7a772026e47ac8da8c1c10c342437d6407f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8E 9672 bytes
font_02_sfnt_off0000ab81.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB81 4324 bytes

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