Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceea1288e8c697e4…

MALICIOUS

PDF

44.5 KB Created: 2020-08-05 13:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fbfc0ca0636c85a47173969998031ae SHA-1: 2bc7b5eb237aff11df5a9cd31e12c359602d2af6 SHA-256: ceea1288e8c697e4f5a9e5f7094ad6c52fca7e74269fc81843afde9c285bcd20
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The primary heuristic indicates the PDF links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the same as the malicious redirector. The presence of numerous external PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content.

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.com/pify?keyword=cardiopatia+ischemica+cronica+pdf
    • http://files.davezinncreative.com/uploads/1/3/0/7/130775979/vitupapeziwa.pdf
    • http://files.maisonmodulaireautonome.com/uploads/1/3/1/3/131384301/tevuje_xeduturejuw_bibebi_bigudukij.pdf
    • http://files.beautifulpinkk.com/uploads/1/3/0/9/130969548/7482742.pdf
    • https://cdn.shopify.com/s/files/1/0438/8939/3816/files/vocabulary_meaning_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5610/2565/files/lovilepipewulojoxotetep.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/lidas.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/80288749921.pdf
    • https://cdn.shopify.com/s/files/1/0437/4944/1687/files/93939599635.pdf
    • https://cdn.shopify.com/s/files/1/0432/9983/1968/files/sezisovabusitejajowa.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8629/files/game_hacking_apps_for_ios.pdf
    • https://cdn.shopify.com/s/files/1/0430/2913/5514/files/43662948459.pdf
    • https://cdn.shopify.com/s/files/1/0429/8126/1466/files/ketumejamaxodes.pdf
    • https://cdn.shopify.com/s/files/1/0438/2585/6662/files/como_tocar_acordeon_de_botones.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6010/files/loxuwawarimisom.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5311/files/24853665293.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_off000065b1.bin
e4dc5de2ed7843195d80faa4acd13a5c808e6547b9c8f38d0f5b7803fa934e31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65B1 5268 bytes
font_01_sfnt_off00007772.bin
2f33036b2224055fb488e7ab47c95bdf4e3d470e8e5dd9a1709ff9ccbe3941c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7772 14444 bytes

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