Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cabd72f4a5b85a8…

MALICIOUS

PDF

58.5 KB Created: 2020-08-31 11:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b708895ee5c1f8d65d8fb98f6067f96f SHA-1: c6ab9c542b67d6d7630b416ee92c7e0e1b6d0372 SHA-256: 4cabd72f4a5b85a868218f342e7e086f537495f7f35ca414826e532d6f22bfc5
150 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains text related to financial administration, suggesting a lure. The presence of a link farm with numerous PDFs hosted on Shopify further indicates a campaign to distribute malicious content. The ML classifier also flagged this PDF with high confidence.

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=introduccion+a+la+administracion+fin
    • https://cdn.shopify.com/s/files/1/0433/3853/0965/files/gitazat.pdf
    • https://cdn.shopify.com/s/files/1/0439/6656/2462/files/75829349436.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2645/files/bapowamunuvedovem.pdf
    • https://cdn.shopify.com/s/files/1/0434/6934/0822/files/18687383871.pdf
    • https://cdn.shopify.com/s/files/1/0434/2988/8161/files/gonagixizebekurusefo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5063/1319/files/xuseb.pdf
    • https://cdn.shopify.com/s/files/1/0432/0601/7185/files/wetematezorolo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/75037692536.pdf
    • https://cdn.shopify.com/s/files/1/0429/6615/5430/files/4064478582.pdf
    • https://cdn.shopify.com/s/files/1/0433/4324/9576/files/ghazwa_e_khandaq_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2341/6987/files/post_acute_withdrawal_syndrome.pdf
    • https://cdn.shopify.com/s/files/1/0431/0430/5303/files/67716030886.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_off0000a497.bin
3b1fde7c30476962eadfc3be1bfa97389e257f09a3fd14758a45a62dbe479faf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA497 5104 bytes
font_01_sfnt_off0000b5d4.bin
04f4f192840c284a8aaa09b12f177bd66c35835860bf88f4d235eac8a950851a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5D4 11616 bytes

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