Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd6d8da73f930da4…

MALICIOUS

PDF

42.5 KB Created: 2020-08-04 07:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96c7a31873ffe6d0472f1694eb040687 SHA-1: cce417d683a00fbb35a1c0e90fe94543454952f1 SHA-256: fd6d8da73f930da4ee5076ccdf43fb3af8f44e55223ac886575c1fca06d0fd86
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a document about water generation systems. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK directly indicates this malicious intent. The ML_NYX_PDF_MALICIOUS classifier also strongly supports this finding. The document body, though heavily corrupted, contains the URL that is likely used as a lure.

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.com/pify?keyword=purified+water+generation+system+design+pdf
    • http://files.churchstrettontaxi.com/uploads/1/3/1/4/131453850/210815.pdf
    • http://files.oregonbigfootfestival.com/uploads/1/3/1/3/131380000/b4bed62f87b.pdf
    • http://files.pnagkc.org/uploads/1/3/1/4/131406893/4e992710aa859.pdf
    • https://cdn.shopify.com/s/files/1/0432/3937/5012/files/54766742428.pdf
    • https://cdn.shopify.com/s/files/1/0437/7211/7141/files/53890069169.pdf
    • https://cdn.shopify.com/s/files/1/0433/5242/4598/files/2532408263.pdf
    • https://cdn.shopify.com/s/files/1/0430/8415/2986/files/93653147843.pdf
    • https://cdn.shopify.com/s/files/1/0428/3482/1287/files/xuwuxenapeg.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66083684812.pdf
    • https://cdn.shopify.com/s/files/1/0427/9874/3719/files/bivutunu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6173/0718/files/sukinomewatelarevusozube.pdf
    • https://cdn.shopify.com/s/files/1/0440/6447/3253/files/modevelax.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/tezaberazoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/49497385696.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_off000066c3.bin
00753f5b3a11c75a56a90ba1bf8057970ffd2fa14c3fcf317ecb77d68e8818e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66C3 5524 bytes
font_01_sfnt_off00007994.bin
fd1670e7ed1be6d591744dda8eb1800d151efb3bab80098e979eb0a2b1ea5570		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7994 10372 bytes

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