Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c18a114b835db93…

MALICIOUS

PDF

41.0 KB Created: 2020-08-08 16:38:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2b153cc353efac90cd0fef6368057b3 SHA-1: 3118fb400b61f68606bc9077d4e310a9bf422112 SHA-256: 3c18a114b835db9376dca43550130c8110d5f1c2a2151c2d98b8975b0597a0f6
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that is designed to lure users to a malicious website. The document body text, while garbled, contains the target URL, reinforcing the malicious intent. The presence of numerous external PDF links, many pointing to similarly structured URLs, suggests a link farm or SEO poisoning tactic to distribute the malicious content.

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.ru/pify?keyword=calendario+2020+con+settimane+pdf
    • http://files.olneyartscouncil.com/uploads/1/3/2/8/132815008/gujotovexowegemapu.pdf
    • http://files.washington-scottish.com/uploads/1/3/0/8/130874318/8b0f395751b7b3.pdf
    • http://files.escollins.com/uploads/1/3/0/7/130740249/nofevixadaw.pdf
    • http://files.camerarepairservice.com/uploads/1/3/2/6/132682040/lafesutaronax.pdf
    • http://fekosat.mlkswim.com/uploads/1/3/0/7/130775403/xebujetet.pdf
    • https://cdn.shopify.com/s/files/1/0430/3332/9817/files/28384599589.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/91120778543.pdf
    • https://cdn.shopify.com/s/files/1/0437/7945/7173/files/89107866599.pdf
    • https://cdn.shopify.com/s/files/1/0433/3672/8744/files/sibubimogegoz.pdf
    • https://cdn.shopify.com/s/files/1/0427/4785/5004/files/mcmaster_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0432/5064/7202/files/carrera_armamentista_guerra_fria.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/74008925008.pdf
    • https://cdn.shopify.com/s/files/1/0428/5690/6911/files/nikujavuduvuwiwemawofizo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/48482030292.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_off00006148.bin
8a60ead7fa36d712fc8f3825df1091baa378936ac8ecc971e207a0b434bf5744		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6148 5480 bytes
font_01_sfnt_off000073ca.bin
7f9ae34985d7d5e38605495c93c68e1cc17efb36eca50fb30634df971148d1d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73CA 10952 bytes

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