Malicious PDF — malware analysis report

Static analysis result for SHA-256 c25e0c1ae5f8cdd9…

MALICIOUS

PDF

44.6 KB Created: 2020-08-15 14:40:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d5fa5d4ceb46e3bc5b0330ef8073304 SHA-1: c64cfd9ece6967ae14ee4f4aa622e4a138bd1e04 SHA-256: c25e0c1ae5f8cdd987aeed5f0294d042e422778b54552c6fa2973f7b6ea29b07
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting urgency and includes the malicious URL. The presence of a link farm heuristic further indicates an attempt to distribute malicious content via numerous seemingly legitimate but ultimately controlled links.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=porque+metformina+produce+acidosis+lactica
    • http://nilikuja.operaunlimited.org.uk/uploads/1/3/1/1/131164128/zixuge.pdf
    • https://cdn.shopify.com/s/files/1/0438/0708/0610/files/small_merge_split.pdf
    • https://cdn.shopify.com/s/files/1/0440/8950/7990/files/pdf_bhagavad_gita_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9124/5733/files/95767654221.pdf
    • https://cdn.shopify.com/s/files/1/0440/9065/4885/files/95785781592.pdf
    • https://cdn.shopify.com/s/files/1/0437/2643/8550/files/tenemodadulobivek.pdf
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/fuxubosisis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50878135704.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4014/files/tawomen.pdf
    • https://cdn.shopify.com/s/files/1/0434/9516/2022/files/nurumosowofapinoxoko.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56346524494.pdf
    • https://cdn.shopify.com/s/files/1/0430/8484/1124/files/72083010484.pdf
    • https://cdn.shopify.com/s/files/1/0430/3470/6083/files/58582153780.pdf
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/sexozekevukunadorep.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_off00007009.bin
7a4567b5554fd5b214f60b403ba70637812f389110a588707fe7cf8f1f30aa8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7009 5428 bytes
font_01_sfnt_off0000825f.bin
ef2c3804543d3c8fdc5dad8c3bd97869c51e8003393a44dc3e0762c205feb076		 pdf-font-stream PDF embedded font (sfnt) at offset 0x825F 10376 bytes

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