Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c9f8684be820a76…

MALICIOUS

PDF

56.6 KB Created: 2020-09-06 02:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43b1bb2e2e8fc3a1741f4ef2c94b0802 SHA-1: 38e4bc015c5766f342b12565bfed0ea0e34e6087 SHA-256: 0c9f8684be820a7627ac8eef6d3ab0700917cffabf16a6d18cd340b01efaf64a
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominent URL identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'artifactory nuget package' and the malicious URL, suggesting a phishing or redirection attempt. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion of a malicious redirector.

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.me/pify?keyword=artifactory++nuget+package
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/df73ab_6a8bbfbc0cd043a394d4c3da219cd8f2.pdf
    • https://static.usrfiles.com/ugd/764aaa_09dfd48e48cb402fa04b7220731802bc.pdf
    • https://static.usrfiles.com/ugd/9757e7_96d4ba5d499a49a197da83d7cc0b3edd.pdf
    • https://static.usrfiles.com/ugd/c3f59f_bdcf8dfe185048c99b94d1fa3430ed55.pdf
    • https://static.usrfiles.com/ugd/74c34a_64fd9d0abce24358898e3805b7d2538d.pdf
    • https://static.usrfiles.com/ugd/c8a981_96c5495a3c784862a3d22566b8c4705a.pdf
    • https://static.usrfiles.com/ugd/911c12_4704752831664f27b382c0bccadb51d6.pdf
    • https://static.usrfiles.com/ugd/9cfd0a_604c1966809b4319a940d77a9a88931b.pdf
    • https://static.usrfiles.com/ugd/dbbfd0_bdba57ab659044608d23732ac621d66a.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0840/files/vuvetadomabalolowil.pdf
    • https://cdn.shopify.com/s/files/1/0429/3473/0911/files/vupusekefemuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/30564709214.pdf
    • https://cdn.shopify.com/s/files/1/0439/1328/1691/files/sinizevapediwubam.pdf
    • https://cdn.shopify.com/s/files/1/0433/8571/6901/files/beamng_drive_free_highly_compressed.pdf
    • https://cdn.shopify.com/s/files/1/0433/1044/8798/files/xusibefuvewuwufadatutu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/82271455170.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vepotarinaf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009338.bin
87999e0603f6a0273827627b286fe8f93c46734cbba873f9d8406fb946725f1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9338 5008 bytes
font_01_sfnt_off0000a45a.bin
0b8ee1a7c369bcce2886918f341a76b8fceacd22a1b251d32c0b12807f898315		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA45A 10108 bytes
font_02_sfnt_off0000c70f.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC70F 4324 bytes

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