Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a9984131ca5d3e8…

MALICIOUS

PDF

43.2 KB Created: 2020-09-02 00:26:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ae862eb255f4e1d84b5abfd0b7ed8a1 SHA-1: e460a50392c3fcca4dbfe81a7d836ac945721886 SHA-256: 0a9984131ca5d3e82f669a5b4817e581f898f21b879b799d9ad813bbf7e1a07a
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ttraff.cc/wix?keyword=dude+simulator+2+guide`. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector link suggest an attempt to lead the user to a malicious site, likely for phishing or further payload delivery.

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/wix?keyword=dude+simulator+2+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b7ed05_4b3ea8ba0a204143b7898480b6cf5644.pdf
    • https://static.usrfiles.com/ugd/2f3216_be0bfb4163cb41378338b96e7f6e99ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_5bee09a4693b4a918a656957d88435fe.pdf
    • https://static.usrfiles.com/ugd/f1d680_644728c79b564caabf0530bb06838883.pdf
    • https://static.usrfiles.com/ugd/f34823_fa2aaa0ea5804e76b4f66a412e1c1463.pdf
    • https://static.usrfiles.com/ugd/824332_aca63732ae2340d687bdc083104a6396.pdf
    • https://static.usrfiles.com/ugd/003b86_ba57a951204b4ca490ed33bd188c97fd.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/pokemon_solar_light_and_lunar_dark_passwords.pdf
    • https://cdn.shopify.com/s/files/1/0432/2230/2888/files/42261596488.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/sales_forecast_excel_spreadsheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/8401/3977/files/vofoxifajiwuxuba.pdf
    • https://cdn.shopify.com/s/files/1/0437/9561/1805/files/cause_and_effect_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/7613/2774/files/37672537555.pdf
    • https://cdn.shopify.com/s/files/1/0428/7135/7596/files/11276630538.pdf
    • https://cdn.shopify.com/s/files/1/0440/2026/9221/files/pafojex.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_off00005db7.bin
b7eb6ead6f1a4f0304e8905128a0b62a7e8e8258540fc43d4f230d608b7a5a52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB7 5052 bytes
font_01_sfnt_off00006eea.bin
23eaacb0374a9c2f7b4a307d6d3cacb1c09a8012214000abcbc9374fda4ee751		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEA 10192 bytes
font_02_sfnt_off000091b5.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91B5 4324 bytes

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