Malicious PDF — malware analysis report

Static analysis result for SHA-256 8608a95a4d5502a4…

MALICIOUS

PDF

67.4 KB Created: 2020-09-07 14:12:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6fa99dac7bb1481f21519a0db025270b SHA-1: ede92348be90ce03c6822a5fe2a44426ce352312 SHA-256: 8608a95a4d5502a4b5a6535fe59088a9862a35e70128b8bb723f8f3811f29daa
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains references to 'Cisco nexus bgp configuration guide' and a URL that appears to be part of an SEO link farm. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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.club/pify?keyword=cisco+nexus+bgp+configuration+guide In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static.usrfiles.com/ugd/b444d4_7da91461d2224385aab1cd8e2eeee709.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a98ecc_7b0f35652e854c458dfe5218fab4b882.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/51c472_696a19dcafac451da9bd3e618e4f85e8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b9801a_e0a17294985e4ea09a690a4f0da34404.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/41a0b6_9470c85c5dd7421e861ec722e26b4a6e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4b68be_c9e910ceec5640be8362817a027e1945.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c7a620_78d059ba39494188a1fe5e11104c8af5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ce14f3_3f47dc1462b6405b8120a7df95405c70.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1a89c8_fa51b3d5112c41f89e10bd9746b3e336.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6c98bc_6bf83c5465194e39ad3e513a47c1444a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/24853a_739b28398656466e8bad7f7640044952.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8e6e76_2a20f5e10d2a47a2b316ddb9b183c9c3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0b46e6_3ab4cda9ed9c491d85070fb2a907790b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/120f26_a86e290743a64c738d7ae342681ca2a2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/16879a_11200d8b1c4240e1a8de255d00f7a54b.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070f6.bin
2ed1d5026e5727352afabe22668be5c43452e8109271dfa1ce239a3a492452de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70F6 15588 bytes
font_01_sfnt_off0000a368.bin
d940f1e75ffffb81c3ea14923da54d78181a260c3edd0a988bb135ec348d1724		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA368 5404 bytes
font_02_sfnt_off0000b5cd.bin
e6330e73e1d157a29c4637bae336bcab9dcc46d8be681be54f5fe2fd0cfe379b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5CD 10780 bytes
font_03_sfnt_off0000da34.bin
aa1464b36b52ac156dd3ea04bc30a94b8376eaa6838293fad627926ea8981a5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA34 16144 bytes
font_04_sfnt_off0000ef2e.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2E 4324 bytes

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