Malicious PDF — malware analysis report

Static analysis result for SHA-256 393ea79876194403…

MALICIOUS

PDF

45.0 KB Created: 2020-08-05 02:32:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a403aae64a28275f2b2bc5851330bb6b SHA-1: c8b3c8338937a529786481ea3cc0eb17381e9f7f SHA-256: 393ea798761944032e5dad2a4dba36607d0f523d115eff5653c489749593687d
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URL 'https://ttraff.cc/pify?keyword=alimentos+con+fibra+soluble+pdf' is a known malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting the primary purpose is to lure users to malicious sites. The ML classifier also strongly indicated maliciousness.

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=alimentos+con+fibra+soluble+pdf
    • http://files.californiafamilyinstitute.org/uploads/1/3/1/4/131453354/8869767.pdf
    • http://biboxem.americanfriendsofthefatherbashfoundation.org/uploads/1/3/1/4/131483138/xasuwibeviniwulegapa.pdf
    • http://files.actingcoachlasvegas.com/uploads/1/3/2/6/132681566/lejele.pdf
    • https://cdn.shopify.com/s/files/1/0440/7640/0792/files/nagusizugovepaxadufukazob.pdf
    • https://cdn.shopify.com/s/files/1/0428/1755/2543/files/anabolismo_muscular.pdf
    • https://cdn.shopify.com/s/files/1/0432/7325/7116/files/riwiboris.pdf
    • https://cdn.shopify.com/s/files/1/0431/4310/2626/files/31139056031.pdf
    • https://cdn.shopify.com/s/files/1/0433/9977/4366/files/46158727777.pdf
    • https://cdn.shopify.com/s/files/1/0436/4481/3470/files/9743216237.pdf
    • https://cdn.shopify.com/s/files/1/0434/2520/2325/files/66393935708.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/43778875991.pdf
    • https://cdn.shopify.com/s/files/1/0434/6360/6429/files/labademawadefitudaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/8579/1383/files/ledelinamoba.pdf
    • https://cdn.shopify.com/s/files/1/0438/5341/4565/files/discrete_wavelet_transform_tutorial.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_off00006e53.bin
8f0d69270a3f97081d0df2ad25a3a6ef93ca63f7324fdba3ab491eb6701b03bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E53 5432 bytes
font_01_sfnt_off000080ad.bin
ffc4f8cb06098cd0a759b9487aceb9042fc9dba12567396b4dada7db59a79a27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80AD 11280 bytes

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