Malicious PDF — malware analysis report

Static analysis result for SHA-256 68d018497780ea65…

MALICIOUS

PDF

38.6 KB Created: 2020-08-31 23:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc646943e08078518a6d57a095837ba8 SHA-1: 293d980b67b3e16491ccb557e9437067fab816a2 SHA-256: 68d018497780ea650c5918f935aa85d1f7ea9d251e943b846a3ce55419c3bf13
154 Risk Score

Malware Insights

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

The PDF contains embedded links that are identified as malicious redirectors, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to a Cisco CCNP syllabus, likely serving as a lure. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports 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.cc/pify?keyword=cisco+ccnp+routing+and+switching+syllabus+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5824/0407/files/atomos_build_no_forma.pdf
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/71735170324.pdf
    • https://cdn.shopify.com/s/files/1/0434/6960/2981/files/558587836.pdf
    • https://static.usrfiles.com/ugd/cb4a18_7ae8241d419f45f48f7e9f8079d2b9fd.pdf
    • https://static.usrfiles.com/ugd/e643da_90942bd043f34eeeb12d9e98d6d91d86.pdf
    • https://cdn.shopify.com/s/files/1/0427/5788/2022/files/sojixo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/hyundai_service_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0430/7206/1591/files/21435522288.pdf
    • https://static.usrfiles.com/ugd/2813e2_f9ae14ffa24945ffb7dbcf38c4f22144.pdf
    • https://static.usrfiles.com/ugd/b8c837_2bcb0b902e1a4dbcb0bfe0b9d88f5f2d.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_off00005727.bin
eb5b5d3221a48143ee02220980542b7cdfe54e3c6d83442fb2f20aa223e406b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5727 5656 bytes
font_01_sfnt_off00006a72.bin
2446fc9fc22c2fbcb7a9e4b6cfd1a6a2463929a45a896f2dc2ac7a2436f78bde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A72 10180 bytes

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