Malicious PDF — malware analysis report

Static analysis result for SHA-256 3edd8e87e52eb86d…

MALICIOUS

PDF

39.7 KB Created: 2020-08-19 09:55:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b362daaa1160f2a504e3e5e075f7ff5 SHA-1: 7bf97b46e29e624ccdd2015d130073733872350a SHA-256: 3edd8e87e52eb86d47782138d8984d1d7219f896024cd95df2fdf9539a3d4cfb
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is a common technique for phishing and malware delivery. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=balance+board+exercises+pdf', indicating an attempt to redirect the user. The presence of numerous other PDF links, many hosted on potentially compromised domains, further supports the malicious intent of a link farm designed to obscure the final destination.

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=balance+board+exercises+pdf
    • http://bogajajil.nicolecudzilophotography.com/uploads/1/3/1/4/131453133/5218580.pdf
    • http://files.johnsonsguns.com/uploads/1/3/1/3/131398212/3961556.pdf
    • http://votage.drisabelfranco.com/uploads/1/3/0/8/130874679/9931042.pdf
    • http://files.kspaceonline.com/uploads/1/3/1/3/131380868/b7e90.pdf
    • https://cdn.shopify.com/s/files/1/0429/1382/4927/files/40300657528.pdf
    • https://cdn.shopify.com/s/files/1/0430/9775/1709/files/ocarina_of_time_master_quest_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/28437795101.pdf
    • https://cdn.shopify.com/s/files/1/0436/7230/5817/files/16085954718.pdf
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/buvepigomewidesukuwugoxux.pdf
    • https://cdn.shopify.com/s/files/1/0440/6195/0117/files/10735079172.pdf
    • https://cdn.shopify.com/s/files/1/0437/4115/1386/files/dafuviged.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_off00005e7c.bin
15b4230cdbd998f3cdb9acd60484e822050b35f7cb45235ccea6b28a4f3d61c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7C 5408 bytes
font_01_sfnt_off000070df.bin
9965f323f25811508e68923c45e495a5883f9f0a061d110543da88416487e25e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70DF 9896 bytes

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