Malicious PDF — malware analysis report

Static analysis result for SHA-256 f13ccb82cde26bcc…

MALICIOUS

PDF

41.5 KB Created: 2020-08-17 06:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4635be06854c701d6d5326f876adf6dc SHA-1: dd2855f66a5c3accf1106fb0b9ff372815b4ea4c SHA-256: f13ccb82cde26bcc40e033d89a29b8fa7b3e2fe8ae80843296e14dfdf5135e36
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One prominent link, however, leads to a redirector URL associated with malicious activity. The document body, though heavily obfuscated, contains text related to 'Age of Empires 2 cheat codes' and the redirector URL itself, suggesting a lure to entice users to click the malicious link. The presence of numerous external PDF links indicates a link farm strategy, likely to improve search engine ranking for malicious content.

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=age+of+empires+2+cheat+codes
    • http://wilupin.alexferguson.co/uploads/1/3/1/1/131164250/vosipepeweduzu.pdf
    • http://files.superhumanflightacademy.com/uploads/1/3/1/4/131407138/zenes-pilep-nefifigifos-ravakaxasuvugaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1868/files/movuxuligidanavugumu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1481/4882/files/vuramopulijozajimitu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/lepugusup.pdf
    • https://cdn.shopify.com/s/files/1/0434/7310/9152/files/96878213142.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6119/files/11567686992.pdf
    • https://cdn.shopify.com/s/files/1/0433/0491/1006/files/41433771849.pdf
    • https://cdn.shopify.com/s/files/1/0434/8493/8402/files/49229305127.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91146339154.pdf
    • https://cdn.shopify.com/s/files/1/0435/2363/7399/files/87778440289.pdf
    • https://cdn.shopify.com/s/files/1/0437/5032/6426/files/ielts_writing_sample_answers_for_general_training.pdf
    • https://cdn.shopify.com/s/files/1/0431/2642/3701/files/jakawoveg.pdf
    • https://cdn.shopify.com/s/files/1/0428/3020/0991/files/persuasive_techniques_in_advertising_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/pazivetaz.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_off0000632e.bin
d77908d882fac8ce415ee4ddb2ca65d0af5861accbdc2fb638767a7a1b02fe51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x632E 5656 bytes
font_01_sfnt_off0000764b.bin
229654d408029d3be87fc0f0c2a73c5e402c63087dbef32ada4486cfa3066be2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x764B 10252 bytes

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