Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eafa5d42ea3ed8d…

MALICIOUS

PDF

49.7 KB Created: 2020-08-31 06:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f70e7e6334abdb3ab500027e7c9edb92 SHA-1: f03579f31527200c7cb6aad03d50837282ec75ba SHA-256: 0eafa5d42ea3ed8d0457d16956ccf09be5bdf107dc3d7cec965cc3f2f20b6878
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external PDF files, forming a link farm. One of the primary links, https://ttraff.ru/wix?keyword=celebrazione+del+meskel+etiope+2011, is flagged as a malicious redirector. This suggests the document is designed to lure users to malicious infrastructure, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=celebrazione+del+meskel+etiope+2011
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/599026_ed9fecfd4fe14d26a7923944712a8457.pdf
    • https://static.usrfiles.com/ugd/ee6770_322bd522a1aa42268adacc87c882e157.pdf
    • https://static.usrfiles.com/ugd/e4ff69_e183ba5115c548e3a46227296f97a0b6.pdf
    • https://static.usrfiles.com/ugd/8a419d_64da551cb6c54a56bff63761cbe2bd73.pdf
    • https://cdn.shopify.com/s/files/1/0437/6612/0602/files/learning_spanish_books.pdf
    • https://cdn.shopify.com/s/files/1/0430/7868/0727/files/sentence_fragment_and_run_on_worksheet.pdf
    • https://static.usrfiles.com/ugd/90423f_1e594e69731b4f7ca17e65911667beef.pdf
    • https://static.usrfiles.com/ugd/fef806_69e66529de764ba1a8f1adfc10901438.pdf
    • https://static.usrfiles.com/ugd/52b593_19a071863f89475cb6f877072c4a64de.pdf
    • https://static.usrfiles.com/ugd/8e1900_73dd50c3ad134fd1a38bce8141ff9692.pdf
    • https://static.usrfiles.com/ugd/c618e9_c660010f95bd41718a5e80c189c3c872.pdf
    • https://cdn.shopify.com/s/files/1/0434/3808/0167/files/bandelette_urinaire_siemens_interprtation.pdf
    • https://cdn.shopify.com/s/files/1/0434/0557/4309/files/67901178897.pdf
    • https://cdn.shopify.com/s/files/1/0430/9912/7959/files/68583761668.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000691d.bin
a67ddf7ad9b7333bc4ee6e351fb55d4f3e2a73bd345e6fe1a7795ced4962fd54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x691D 9260 bytes
font_01_sfnt_off00008189.bin
e79bda3e256877af0d21168e040230caf07c138fa08def67ede921c47e8496d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8189 5592 bytes
font_02_sfnt_off00009470.bin
b6fd5ac1a2bb0fbb2e82935526224d679dc162fd6574fb4802a08707ed007e2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9470 10980 bytes

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