Malicious PDF — malware analysis report

Static analysis result for SHA-256 9527c8cd022d59cb…

MALICIOUS

PDF

39.7 KB Created: 2020-08-06 17:26:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7aa6e39e0075de0addb8b943e22c2210 SHA-1: 6340efd017f176bb15e7ef22cff5a434a831955b SHA-256: 9527c8cd022d59cb95ab78ea0e2c9fc60fe600d35c7b04e24d3d5d494556d868
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=blank+august+2020+calendar+pdf'. This URL is likely used to redirect users to a malicious site. The document body also contains this URL and numerous other links to PDFs hosted on Shopify, suggesting a link farm or SEO poisoning attempt to distribute malicious content. 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.ru/pify?keyword=blank+august+2020+calendar+pdf
    • http://files.ddraonline.com/uploads/1/3/1/3/131380687/a1eced873bc1.pdf
    • http://files.veblaw.com/uploads/1/3/2/6/132682829/zeperolixevalotiwava.pdf
    • http://files.mexicoluminaria.com/uploads/1/3/2/7/132740285/f130c64.pdf
    • http://files.prairieolive.ca/uploads/1/3/0/7/130776110/c0a64246.pdf
    • https://cdn.shopify.com/s/files/1/0431/6495/8879/files/fezaboxuvuzazaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8947/files/43388733655.pdf
    • https://cdn.shopify.com/s/files/1/0434/6760/4128/files/50338618048.pdf
    • https://cdn.shopify.com/s/files/1/0429/6704/0154/files/mujikipobetubivanonowiti.pdf
    • https://cdn.shopify.com/s/files/1/0439/2468/4968/files/amalgamation_of_companies_notes.pdf
    • https://cdn.shopify.com/s/files/1/0429/4069/4684/files/vba_export_to.pdf
    • https://cdn.shopify.com/s/files/1/0431/6289/4498/files/75587881154.pdf
    • https://cdn.shopify.com/s/files/1/0430/1262/0447/files/75642351599.pdf
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/50961480750.pdf
    • https://cdn.shopify.com/s/files/1/0432/2679/2098/files/50766377843.pdf
    • https://cdn.shopify.com/s/files/1/0430/6288/6554/files/dijoterawumukenarezu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1540/3682/files/60286355846.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_off00005b2b.bin
375e972168ff087df3ba6f4bab5b5cff7e2537a5636c6ef0491a2c46610ce975		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B2B 5712 bytes
font_01_sfnt_off00006eb7.bin
7b375eb6b3b35497ef624b034053672cdcdd86319066d4ee574d7aa450d44345		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB7 10512 bytes

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