Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5c12b2af8a183f3…

MALICIOUS

PDF

39.6 KB Created: 2020-08-23 06:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f976132ce1c13c99ed9a5f9ca3e36f1 SHA-1: b915b4576ea3ff4e4cb7bbc4690a2099a24716d9 SHA-256: c5c12b2af8a183f3e3c7defcdaa1b79a40b09642fb9178cfcc0d0647862f729c
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.ru/pify?keyword=cellsentials+usana+pdf+espa%25C3%25B1ol', points to a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of a link farm and a malicious redirector indicates an attempt to lead users to malicious content, likely for phishing or malware delivery.

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=cellsentials+usana+pdf+espa%25C3%25B1ol
    • http://files.theidealtrip.com/uploads/1/3/1/1/131164202/c79560ca13a8.pdf
    • https://cdn.shopify.com/s/files/1/0430/6737/5770/files/tuveravem.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1140/files/xatoralun.pdf
    • https://cdn.shopify.com/s/files/1/0434/1838/6588/files/gewokulelerubot.pdf
    • https://cdn.shopify.com/s/files/1/0441/2515/9576/files/vitarures.pdf
    • https://cdn.shopify.com/s/files/1/0428/7909/0855/files/gukojojuxavuremakaruxur.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xutowoterefabobenovise.pdf
    • https://cdn.shopify.com/s/files/1/0449/5353/4632/files/logo_quiz_answers_level_5_logo_58.pdf
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/muzinoborutodov.pdf
    • https://cdn.shopify.com/s/files/1/0432/0290/4222/files/gibujiwodavalejujov.pdf
    • https://cdn.shopify.com/s/files/1/0450/3427/4966/files/broad_based_black_economic_empowerment.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2297/files/zorowolipulu.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_off00005b43.bin
34e0d21c5efb621ef3bb0da67ea927e703059c618156bf3e0c99b50da4bcbe6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B43 5056 bytes
font_01_sfnt_off00006c41.bin
4aeff3b5c85dab88b39b79eb28a3bae129c7c0dfe124e2e305600cbc151c1d4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C41 10532 bytes

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