Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee433e2fb88573f…

MALICIOUS

PDF

52.3 KB Created: 2020-08-10 20:15:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88b4d619f0c9c83e3e99054edc62f2d6 SHA-1: 8f56cb748ece81dba3f0ab8e5c2aafa2d0f1b577 SHA-256: 1ee433e2fb88573f65da83761d6e56912aac6352acb1dd417273698c88c01817
120 Risk Score

Malware Insights

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

The PDF contains numerous links to external PDF files, many hosted on Shopify domains, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though partially corrupted, contains keywords related to educational materials, likely to attract unsuspecting users. The primary attack pattern involves luring users with seemingly relevant content to a malicious redirector.

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=ncert+books+for+class+7+maths+free+download+pdf
    • http://files.bhameconsoc.com/uploads/1/3/2/6/132682684/julusasulumiwa.pdf
    • http://files.dancinglikethestarsanderson.org/uploads/1/3/1/4/131454383/6172300.pdf
    • http://files.stalbanstpetebeach.org/uploads/1/3/1/4/131406507/xoxugujodananux.pdf
    • http://gaduxira.parentsassociationofriley.com/uploads/1/3/1/4/131407089/3619148.pdf
    • https://cdn.shopify.com/s/files/1/0432/4573/2007/files/dopagawegeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/1995/9463/files/appendicitis_classification.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3854/files/40558064308.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78992801071.pdf
    • https://cdn.shopify.com/s/files/1/0429/1543/0559/files/92443083068.pdf
    • https://cdn.shopify.com/s/files/1/0431/2586/6662/files/balance_general_libro.pdf
    • https://cdn.shopify.com/s/files/1/0433/2558/7609/files/teteritamazixoliguju.pdf
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/wivepine.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/24910945956.pdf
    • https://cdn.shopify.com/s/files/1/0434/5770/8185/files/54226986023.pdf
    • https://cdn.shopify.com/s/files/1/0440/2675/7270/files/manual_biomagnetismo_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0432/8561/0654/files/vutufotov.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_off00008d61.bin
3062b131753271f6366f999e77eee00d07863a715c4fa688b50cdc6251ed2cdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D61 5740 bytes
font_01_sfnt_off0000a0de.bin
b62c6ddd02536003d40bc18eaddf16d1fcfe8c8e1fe3fd37b3fff4a7165bead9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0DE 10644 bytes

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