Malicious PDF — malware analysis report

Static analysis result for SHA-256 d838b5adf6df9a96…

MALICIOUS

PDF

32.9 KB Created: 2020-08-03 09:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 663df3355c18ad9269b3002e91d0891f SHA-1: b1ff2feae349fd1d757b3db09c2c425e14b620d3 SHA-256: d838b5adf6df9a9641e4322380e06c067ef806fe68cb7b78fd156a952a8e920a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=metal+gear+solid+ringtone'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a PDF link farm further supports a social engineering or spamming attack vector. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact lure.

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=metal+gear+solid+ringtone
    • http://files.radpanovphotography.com/uploads/1/3/2/7/132740281/teradigifekosege.pdf
    • http://files.hagerbekel.org/uploads/1/3/1/8/131871744/5055287.pdf
    • http://files.vickisoarart.com/uploads/1/3/1/4/131410479/girugifuni.pdf
    • https://cdn.shopify.com/s/files/1/0440/5103/8358/files/55920401518.pdf
    • https://cdn.shopify.com/s/files/1/0428/6427/9718/files/c_hash_table_implementation.pdf
    • https://cdn.shopify.com/s/files/1/0433/1264/4251/files/minecraft_discord_servers.pdf
    • https://cdn.shopify.com/s/files/1/0435/1649/3976/files/sitekosaduxewu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9059/9319/files/58747238935.pdf
    • https://cdn.shopify.com/s/files/1/0431/1184/1958/files/repapetewonewaviniwav.pdf
    • https://cdn.shopify.com/s/files/1/0439/3874/2430/files/baselakufatuzititamemo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1024/4256/files/fizujozulamoribezagil.pdf
    • https://cdn.shopify.com/s/files/1/0432/2128/7080/files/71006000517.pdf
    • https://cdn.shopify.com/s/files/1/0430/4565/0586/files/14802142919.pdf
    • https://cdn.shopify.com/s/files/1/0428/7702/6463/files/zifidulozetuwezoruto.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_off0000431b.bin
f3590bf9107ef4a4a5ae84c494bde91cc22d34ae24831768a07616488eb347d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x431B 5000 bytes
font_01_sfnt_off00005433.bin
f7b2ff23ca228c58fcef4d4ced596240f1a5777aaae99adad96bc491b3923cd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5433 10168 bytes

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