Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0239d9cca913cd3…

MALICIOUS

PDF

54.8 KB Created: 2020-08-23 01:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e01880c2fe228cf82fdec349f0c3d21 SHA-1: 68e1e4f7d0b6916b0f8d353c003a078c24767c68 SHA-256: c0239d9cca913cd3ba53bb8749b981db9f1d6bb93058c823c319184e9044afb3
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, with a critical heuristic firing indicating a PDF link farm. The primary malicious URL identified is ttraff.ru, which is flagged as a malicious redirector. While many other links point to benign Shopify-hosted PDFs, the presence of the redirector and the sheer volume of links suggest an attempt to manipulate search engine results or distribute malicious content indirectly. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=number+format+javascript+function
    • http://guzoziwe.owenyelland.com/uploads/1/3/1/3/131381352/tuwubefaj.pdf
    • http://files.uniquedezhines.com/uploads/1/3/1/3/131379306/3fe8d256e04f.pdf
    • https://cdn.shopify.com/s/files/1/0433/5134/3269/files/87340759742.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/45599408882.pdf
    • https://cdn.shopify.com/s/files/1/0434/2202/3847/files/pilinejarojoduxigemakuni.pdf
    • https://cdn.shopify.com/s/files/1/0434/3182/1473/files/leagueadda_fantasy_app.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/caballo_de_troya_saga_completa_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0440/2331/6630/files/twee_afbeeldingen_samenvoegen.pdf
    • https://cdn.shopify.com/s/files/1/0435/9897/1038/files/44114240326.pdf
    • https://cdn.shopify.com/s/files/1/0458/6435/3945/files/afmc_2018_admission_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/accounting_systems_and_processes.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/94673528897.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_off000088c3.bin
d237c42ced2cbdc6ae92a74d4d6be4f7a00ed855fbeb9408b889b139d2e7c40e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88C3 5376 bytes
font_01_sfnt_off00009b05.bin
bee9707d6c92048e134b36a74c59e78d0867c01840b4ed2453d0376e8f62e42e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B05 16264 bytes

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