Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac8cb0a1b37447e9…

MALICIOUS

PDF

41.0 KB Created: 2020-08-16 20:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c38265a225b2af2bf0f00cbb436fc286 SHA-1: d787ff50d76103386301eb7a58cdaf30beb9b2b5 SHA-256: ac8cb0a1b37447e9a7c9ec178ba10b8de7853dfc36315f5ea2f11eba2bed538a
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for song lyrics, likely to entice clicks. The presence of numerous external PDF links further supports a link farm or redirection strategy. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=boom+boom+momoland+lyrics
    • http://files.scamwatchphilippines.com/uploads/1/3/2/7/132740930/3026909.pdf
    • http://files.cabravets.com/uploads/1/3/2/7/132741535/5029231.pdf
    • http://files.cristinacaruana.com/uploads/1/3/1/0/131069886/c9642871239.pdf
    • https://cdn.shopify.com/s/files/1/0431/4211/9592/files/9352393876.pdf
    • https://cdn.shopify.com/s/files/1/0436/9724/2280/files/69071300363.pdf
    • https://cdn.shopify.com/s/files/1/0431/5188/4445/files/67925084806.pdf
    • https://cdn.shopify.com/s/files/1/0433/8778/1276/files/mepugivirixigenotuped.pdf
    • https://cdn.shopify.com/s/files/1/0435/8209/5517/files/zarotikokekonewiwusubiza.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/botany_objective_questions.pdf
    • https://cdn.shopify.com/s/files/1/0429/8519/3621/files/spanish_to_english_translation_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8617/files/40635932114.pdf
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/dabotanajo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4756/7010/files/magia_cabalistica.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d39.bin
b1618d0fea39bf8886cac38202594366962f6aa22d674ecd5d0088c8b7b2afe5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D39 3096 bytes
font_01_sfnt_off00005854.bin
ad82060e34f63fcf8014420a2501db82199cd85828f6a176cfbb7ab990c4bbe8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5854 5376 bytes
font_02_sfnt_off00006a7d.bin
e60f13a2e2e198de8cb8d9fd6fae9576f9c1c2abb218a8fa1f36bd7b4aad962d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7D 13624 bytes

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