Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ac819b8d0dcca30…

MALICIOUS

PDF

42.9 KB Created: 2020-08-29 06:17:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce3d9bb7f12feaae305c52ddb47c694b SHA-1: 53c185362f17437636519748b8d0f3b00e821804 SHA-256: 0ac819b8d0dcca30749eba97a44d6064a16c7a6b88d2ddc1a934bfe79ccf5e5a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to a known malicious redirector, ttraff.ru. The document body, though heavily obfuscated, contains text related to downloading a book, suggesting a lure. The presence of numerous external PDF links further indicates a link farm or redirection scheme designed to lead 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/wix?keyword=descargar+libro+de+abramelin+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_98506268603e48a28eca9bdc54a1166a.pdf
    • https://static.usrfiles.com/ugd/b8c837_e20c63f2fa844a8293d529830eaeef1e.pdf
    • https://static.usrfiles.com/ugd/b8c837_1107cff6c33844f5a82bf5b9e8e08998.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad930f9d705b458d8c3e80af9d8e9ac8.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d963c41c3254c718a19e9826dba365e.pdf
    • https://static.usrfiles.com/ugd/b8c837_642773ac15ce4b6585d5d3bfa5f34a20.pdf
    • https://static.usrfiles.com/ugd/b8c837_4947f2c62b194e33afa7c93d8e621d0e.pdf
    • https://static.usrfiles.com/ugd/b8c837_83e238e609754ece8cb303595b7fac41.pdf
    • https://static.usrfiles.com/ugd/b8c837_12c70df8f6874c928cbe2bf06766e928.pdf
    • https://static.usrfiles.com/ugd/b8c837_4beff0f657e540daa5779a85428a28d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_2cc151931659490da406f5a076073cb9.pdf
    • https://cdn.shopify.com/s/files/1/0431/9232/0161/files/zuwarebafapoxuf.pdf
    • https://cdn.shopify.com/s/files/1/0436/1958/2110/files/bass_arpeggios.pdf
    • https://cdn.shopify.com/s/files/1/0430/8375/9765/files/free_download_adobe_reader.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000670e.bin
0ee87eb3a2ecb887974e9d05211ca5feec0f676a4661657c8c6e183909c757e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x670E 5612 bytes
font_01_sfnt_off000079ff.bin
576b5aaad326dcaf84f1e48056ae7b696788f1641509420798cfb1625ed80a25
pdf-font-stream PDF embedded font (sfnt) at offset 0x79FF 11440 bytes