Malicious PDF — malware analysis report

Static analysis result for SHA-256 453b40235acc5f7a…

MALICIOUS

PDF

53.8 KB Created: 2020-08-20 19:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c84fb83220e8667e20fcf93ae0d0138 SHA-1: ad3b9384619765da37ce25698a970d293e834b57 SHA-256: 453b40235acc5f7ab5ffd86f8b7bd599ef4e239425643c794f28e866345a7d9b
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The PDF also exhibits characteristics of a link farm, suggesting an attempt to distribute traffic to various external resources. The document body, though partially corrupted, contains a string that appears to be a keyword for a search, further supporting the lure aspect.

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=cours+atomistique+en+arabe+pdf
    • http://tufaru.wendyjfox.com/uploads/1/3/1/3/131398455/8203825.pdf
    • http://senija.shannontkd.com/uploads/1/3/1/4/131406149/limibesiponug.pdf
    • http://wopumese.entreprenora.co.uk/uploads/1/3/2/6/132681946/semonuko.pdf
    • http://vaxusukew.lavarsteelart.com/uploads/1/3/1/1/131164392/2402901.pdf
    • http://files.a-custom-esl-tutoring.com/uploads/1/3/0/7/130775265/zirugowub.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9121/files/gedan.pdf
    • https://cdn.shopify.com/s/files/1/0435/2904/4119/files/mutodaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6241/files/7919924137.pdf
    • https://cdn.shopify.com/s/files/1/0428/9773/5843/files/861852144.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65107231385.pdf
    • https://cdn.shopify.com/s/files/1/0432/4936/9252/files/rurobabama.pdf
    • https://cdn.shopify.com/s/files/1/0440/2751/0934/files/28109410648.pdf
    • https://cdn.shopify.com/s/files/1/0429/2853/7753/files/14501237232.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/82533252888.pdf
    • https://cdn.shopify.com/s/files/1/0434/2589/0466/files/87074044010.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_off00008f80.bin
26fac9bc430e69df89add70f2daf3ea4e2bc48e1f22d19993d35ed300c3c1be2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F80 5328 bytes
font_01_sfnt_off0000a179.bin
9c279ec583a6cdfc285af134a38a80386eaf658d36d07eec967ac6b653dcd101		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA179 12336 bytes

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