Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab8455e397f22b3…

MALICIOUS

PDF

43.2 KB Created: 2020-08-18 20:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87f99f15a390b24c35405e35a60b72fa SHA-1: ce0206ac4a7961604a7cc25badef2fb4d46f03c0 SHA-256: fab8455e397f22b34ef4d39a58520b749c4d8f2139170d318ffed9430c24f595
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links to external PDF documents, a technique often used for SEO manipulation or to host malicious content. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=bdd+story+template', is flagged as a malicious redirector. The document body itself is heavily obfuscated and contains references to the redirector URL and other Shopify-hosted PDFs, suggesting a coordinated effort to distribute content through these links.

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=bdd+story+template
    • http://files.castlethorpecricketclub.co.uk/uploads/1/3/1/6/131606874/d5ca01f8.pdf
    • http://files.sanctuaries.org/uploads/1/3/1/8/131856443/jebegesogitesol.pdf
    • http://files.asampoh.com/uploads/1/3/0/7/130776131/betevedugago_sikovebulek.pdf
    • http://files.darkhorsesaddlery.com/uploads/1/3/2/3/132303035/7dd19e.pdf
    • https://cdn.shopify.com/s/files/1/0450/2241/2958/files/curriculum_assessment_and_evaluation.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6178/files/punjabi_couple_wallpaper_full_hd.pdf
    • https://cdn.shopify.com/s/files/1/0438/2795/3824/files/cessna_208_maintenance_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7668/files/38027750375.pdf
    • https://cdn.shopify.com/s/files/1/0434/6327/8758/files/clasificacion_de_las_empresas_segun_su_tamao_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0435/2131/0880/files/buxararila.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/64946579335.pdf
    • https://cdn.shopify.com/s/files/1/0440/3019/7925/files/1998_jeep_cherokee_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/9119/0167/files/52449081257.pdf
    • https://cdn.shopify.com/s/files/1/0434/1284/8790/files/zofanoxilafixamake.pdf
    • https://cdn.shopify.com/s/files/1/0447/9533/0717/files/63129132157.pdf
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/29718899881.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_off00006ac4.bin
9df60cadb3252f0852aca7a9b6258ce3cfd0aaf0e2cc6573f330828594806a81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC4 5256 bytes
font_01_sfnt_off00007c92.bin
5823c9f11f3d7894c24bd79beb52e3920746544de195205042df718dd38889bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C92 10428 bytes

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