Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7cb05d4b931044e…

MALICIOUS

PDF

42.4 KB Created: 2020-08-03 22:17:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fa005a8edf205e116f0c9cd31b3882a SHA-1: ae6904ecedbc46fb02f35d444ae370250edb2ca7 SHA-256: a7cb05d4b931044e833983318593efdec21a2c7e9655a65525559da87dc01c4d
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=sprinkler+irrigation+types+pdf'. This URL is presented within the document body, disguised as information about sprinkler irrigation. The file also exhibits characteristics of a link farm, embedding numerous external PDF links, many of which point to benign Shopify domains, likely to improve search engine ranking and obscure the malicious redirector. 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.com/pify?keyword=sprinkler+irrigation+types+pdf
    • http://jozake.petraschool.org/uploads/1/3/1/4/131407818/sidegezolesi.pdf
    • http://files.midtown-office-space.co.uk/uploads/1/3/1/3/131383467/tixekinifuzuku_notifavikakedag_dokaxuni.pdf
    • http://files.college-boundplayerportal.com/uploads/1/3/1/4/131453861/a52be56aa19.pdf
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/44351081011.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41557636134.pdf
    • https://cdn.shopify.com/s/files/1/0430/6662/2101/files/50536507285.pdf
    • https://cdn.shopify.com/s/files/1/0435/8746/9471/files/9218754146.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/68875377062.pdf
    • https://cdn.shopify.com/s/files/1/0438/3201/7058/files/16417191391.pdf
    • https://cdn.shopify.com/s/files/1/0437/6231/9517/files/70634353854.pdf
    • https://cdn.shopify.com/s/files/1/0431/4418/3974/files/25238410224.pdf
    • https://cdn.shopify.com/s/files/1/0436/3180/4574/files/zujimanipawolajabuwigesep.pdf
    • https://cdn.shopify.com/s/files/1/0438/9430/9019/files/61241087896.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/dexadoxarobej.pdf
    • https://cdn.shopify.com/s/files/1/0429/6635/2025/files/jefanamorisaxalenos.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_off0000663a.bin
2e17dce913c52faa1aa25f6d1c64b89756ddce500f6fc77fb2710e9dad66d0da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x663A 5480 bytes
font_01_sfnt_off000078fa.bin
72bf5f0a65dffac767a4bd4c8a835d0cfb7c5b9cd32bec303d9c4c53fe7bfb6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78FA 10484 bytes

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