Malicious PDF — malware analysis report

Static analysis result for SHA-256 fccfedc65cee8cc7…

MALICIOUS

PDF

43.9 KB Created: 2020-07-30 14:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fa63c6038bd7f82dc75f9285d7befad SHA-1: 30c3f8302f2de8420172e87e6750d137d9902f83 SHA-256: fccfedc65cee8cc7ef8ef099a3e83dc1bf9910f3a326c17e7ec0b36a3d5a70c0
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to downloading a PDF, suggesting a lure. The presence of numerous external links, including to Shopify domains, indicates an attempt to create a link farm for SEO poisoning or to distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=descargar+operatoria+dental+barrancos+5ta+edicion+pdf
    • http://files.gentlemansmaven.com/uploads/1/3/1/4/131453917/0644b0fce153b5.pdf
    • http://files.waistbeadsbylmt.com/uploads/1/3/0/7/130739559/63f753d8.pdf
    • http://files.faithtowalkministries.com/uploads/1/3/1/3/131384442/mifip.pdf
    • http://files.streetfootballwales.com/uploads/1/3/1/4/131452858/zaxatunezebuvuda.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/37280394454.pdf
    • https://cdn.shopify.com/s/files/1/0428/5205/7244/files/nenotifilivi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kuwuvovevikusezavufada.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9381/files/26806102785.pdf
    • https://cdn.shopify.com/s/files/1/0440/2606/9157/files/fogokijixejafimelofivo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/sopibuzov.pdf
    • https://cdn.shopify.com/s/files/1/0431/9232/0161/files/29361558083.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gijamibumiji.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3737/files/dekiguleduk.pdf
    • https://cdn.shopify.com/s/files/1/0431/4732/9702/files/43632007222.pdf
    • https://cdn.shopify.com/s/files/1/0429/4492/1766/files/34209170517.pdf
    • https://cdn.shopify.com/s/files/1/0429/7624/7971/files/67522771809.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_off00006d36.bin
eaee25e11d706e3db3701ca0c279ec595414e482dc134c221b6610c3f8b77a24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D36 5372 bytes
font_01_sfnt_off00007f88.bin
5fc9d10b7ade88c01704f078bedbb1ef58efe9b8e30352c673ee87ffa841be3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F88 10084 bytes

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