Malicious PDF — malware analysis report

Static analysis result for SHA-256 cda03d09fe780c03…

MALICIOUS

PDF

51.2 KB Created: 2020-08-26 16:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f82cb59723581a7756b0acb6753e8e0 SHA-1: 6a92b4c60f9a1262f54ca259aa4ac20bf1e5551e SHA-256: cda03d09fe780c03d136bc4bd4fcb9d84d18bb36de3f0e1eb7fcd88ed6484912
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the embedded link leads to known malicious infrastructure. The document body, though heavily obfuscated, contains the target URL, suggesting a lure to a malicious site. 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=kryteria+diagnostyczne+z+dsm-5+desk+reference+chomikuj
    • http://files.jenniferaganem.com/uploads/1/3/1/3/131398097/8564ae9fe1.pdf
    • http://files.rochin.com/uploads/1/3/0/8/130813841/8513738.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/kidojeso.pdf
    • https://cdn.shopify.com/s/files/1/0437/9371/1265/files/96421019061.pdf
    • https://cdn.shopify.com/s/files/1/0428/4301/3287/files/wopujurewevo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5661/8911/files/nirazomotamuzudim.pdf
    • https://cdn.shopify.com/s/files/1/0434/5030/2616/files/auxiliary_verbs_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/room_service_menu_jackson_ms.pdf
    • https://cdn.shopify.com/s/files/1/0457/3688/6428/files/desukevofifumijufer.pdf
    • https://cdn.shopify.com/s/files/1/0437/7398/4919/files/blood_group_test_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/6458/1525/files/catalogo_price_shoes_urbano_2020.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_off000088ed.bin
7004e344a2ea65dedb6d014ea87b8ff4852e66a6075b3a696f34b8d27b78234f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88ED 5820 bytes
font_01_sfnt_off00009cb4.bin
c4339e2d312d14bf6e28537790838b7ff5476227454c1ad0c31f1567555e71d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB4 10192 bytes

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