Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ececeb22971f634…

MALICIOUS

PDF

42.6 KB Created: 2020-09-02 00:16:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3a14084d62af6c36bad6f20e2e62b55 SHA-1: 90ae7e878f1ba85d9374a5a5fc1178520d5ea9ef SHA-256: 0ececeb22971f634db30daed9ad244858970212817a943cc4ff45bd1455d3afe
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector infrastructure. The primary malicious URL identified is ttraff.cc, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to disguise the malicious intent. The ML classifier also strongly indicated maliciousness.

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=modals+certainty+probability+possibility+exercises+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/ef253e_941d9d4533ec44a784ec5b07c45e9b97.pdf
    • https://static.usrfiles.com/ugd/6d59ab_4b959ae8d2284f06bf3a69d2884d25b1.pdf
    • https://static.usrfiles.com/ugd/4725f1_28cf54927ada4b50888dac1f268223b0.pdf
    • https://static.usrfiles.com/ugd/917232_e2cc136683ca4644b174abca04e29af0.pdf
    • https://static.usrfiles.com/ugd/97aff7_3ea17a68d3a84ca3b831eab566a16c69.pdf
    • https://cdn.shopify.com/s/files/1/0436/0532/8034/files/daily_sales_forecast_template_excel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/gifodesegezuvobukav.pdf
    • https://cdn.shopify.com/s/files/1/0430/5335/1066/files/que_estudia_la_genetica.pdf
    • https://cdn.shopify.com/s/files/1/0428/5012/3932/files/burma_superstar_cookbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/8602/0761/files/26321832734.pdf
    • https://static.usrfiles.com/ugd/0d002d_036484e857fd43e09d10b1731cd3c4b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2b9c0691c9c469990171cac812cc43f.pdf
    • https://static.usrfiles.com/ugd/805d2a_b1ce4aa504db4107961640b8e633cb10.pdf
    • https://static.usrfiles.com/ugd/c12414_7b4a9cbb290c4f6cb38c4c548f60e21d.pdf
    • https://static.usrfiles.com/ugd/5438e3_8804dda6536e43948ffd1d2c9ed146c0.pdf
    • https://static.usrfiles.com/ugd/b5472a_d76dc277ea814f1da5515d60f08d37b7.pdf
    • https://static.usrfiles.com/ugd/1c8c1e_3c1d0309692b4db496c7842f4b113701.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_off0000668a.bin
dcbf6a3ab50e6f734b3795040f6e445c465bcb4d292076eed7abab499f42b422		 pdf-font-stream PDF embedded font (sfnt) at offset 0x668A 5464 bytes
font_01_sfnt_off00007944.bin
2939a12d1871354ad5f943b36fc1ed57d1361abe97609a73c170a5f7e00c5c16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7944 10500 bytes

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