Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9f908b6d06ca174…

MALICIOUS

PDF

38.2 KB Created: 2020-08-04 19:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 633b34db505d479e1fca770d8fe85249 SHA-1: 3f43800ebdff8986d704fcfa44eb023b69824659 SHA-256: a9f908b6d06ca174b4c4b47a3c2bfd0334c40dcf63cfc70f382474899b87dc3f
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting an attempt to create a link farm or distribute content through numerous seemingly benign URLs. The primary malicious URL identified is https://ttraff.ru/pify?keyword=cedaw+pdf+mexico, which likely serves as a gateway to malicious content. No scripts were extracted from this sample.

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=cedaw+pdf+mexico
    • http://files.aprilnieves.com/uploads/1/3/1/4/131453395/dogemas.pdf
    • http://files.mizpah36.org/uploads/1/3/1/3/131379045/6624586.pdf
    • http://files.charleswakefieldartist.com/uploads/1/3/0/9/130969577/db9b18f31.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40948382406.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7934/files/18111093028.pdf
    • https://cdn.shopify.com/s/files/1/0431/3638/5181/files/663389901.pdf
    • https://cdn.shopify.com/s/files/1/0435/9605/4690/files/minecraft_dimension_ids.pdf
    • https://cdn.shopify.com/s/files/1/0431/5535/7852/files/2007_vw_rabbit_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/75892252408.pdf
    • https://cdn.shopify.com/s/files/1/0430/9437/6599/files/49180139729.pdf
    • https://cdn.shopify.com/s/files/1/0441/2620/8152/files/boot_flags_for_hackintosh.pdf
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/26613457316.pdf
    • https://cdn.shopify.com/s/files/1/0432/2135/2606/files/xefufojebakedi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9875/8557/files/38277206963.pdf
    • https://cdn.shopify.com/s/files/1/0431/6400/8610/files/vojoxufipekowalumu.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_off0000585e.bin
ffd6220597b61981237574e0b2159ccc44ec228efdb020b9c251a93fcb9e4c4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x585E 5060 bytes
font_01_sfnt_off000069a2.bin
6278d4fc3a430321c54ef9b74bffbefffe65f095bd13d9912cbd51bc0bca9ab2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69A2 10180 bytes

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