Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ddab174bd6e0629…

MALICIOUS

PDF

53.9 KB Created: 2020-08-09 20:40:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e052d9c09851c6385111d98fb5966e09 SHA-1: 4918cdbb567eb3408f2acccd077dcabf85f8de19 SHA-256: 0ddab174bd6e0629f2a77eeb397841c56d5af2dcb047a04bca1e0f6e0aaf3ba0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with the primary URL identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same URL as the primary redirector, suggesting an attempt to lure users to malicious content.

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/pify?keyword=newspaper+article+template+pdf
    • http://files.theroamingresearcher.com/uploads/1/3/1/0/131070674/diguvafasixanarakimu.pdf
    • http://files.lacymitcham.com/uploads/1/3/0/7/130775354/2f88945fd0c.pdf
    • http://wadekol.javakhkservice.com/uploads/1/3/2/7/132710797/4308312.pdf
    • http://lizadimbleby.com/uploads/1/3/1/6/131606227/35f50b2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/4405/9806/files/rewusimo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0508/3811/files/98139017664.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/foxilubepupilu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66691602327.pdf
    • https://cdn.shopify.com/s/files/1/0437/7945/7175/files/49600723886.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/38238769952.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/21058187868.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/vuwavovaxifukujudezuxone.pdf
    • https://cdn.shopify.com/s/files/1/0427/5883/2294/files/kibofawidilibotakatifamir.pdf
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/3229005933.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/nuwesukiwaxukukiwo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3801/files/75165469726.pdf
    • https://cdn.shopify.com/s/files/1/0431/3976/0285/files/capacitor_en_corriente_alterna.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007600.bin
fe93a11b033cecb9fef6f08165adfc7618ef04467d5febdf8965a8353759e885		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7600 5364 bytes
font_01_sfnt_off00008834.bin
f71a47484c95d7a8a65244bd51e38c405cd89f9b07b6a5ad15c9a573391ef875		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8834 2052 bytes
font_02_sfnt_off000090ea.bin
b6dab0d25412e55b8f3e2c41f33b816b1566b92c008db0b49f09ccbc50dffa11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90EA 10128 bytes
font_03_sfnt_off0000b3da.bin
684a3c196e802b4dc45ee85e0d12f41c83d6b6c6a55a83cec5fb8e332ee9aa36		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3DA 16376 bytes

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