Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b70e6b16fbf4f78…

MALICIOUS

PDF

59.1 KB Created: 2020-08-30 14:39:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a227e296abbf34e644f4951d4fbbc365 SHA-1: 9247044b6ebd648b5122a655b8fdacf4cb79eb12 SHA-256: 0b70e6b16fbf4f78b6ed1c45f5a2866c280ae1cf621bae3b923f447f658709a0
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 'ttraff.ru'. The document body, though heavily obfuscated, contains a URL that matches this finding. This suggests the PDF is designed to redirect users to a malicious site, likely for phishing or malware distribution. No scripts were extracted from this sample.

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.ru/wix?keyword=d3d9.dll+%25D0%25B4%25D0%25BB%25D1%258F+fallout+3+%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2501/4684/files/redarujimasudusof.pdf
    • https://cdn.shopify.com/s/files/1/0433/4682/1278/files/eggs_for_bart_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6821/8780/files/fuxugolanowuradopikozoze.pdf
    • https://cdn.shopify.com/s/files/1/0435/3087/9125/files/16934254063.pdf
    • https://cdn.shopify.com/s/files/1/0429/7129/9999/files/80277999377.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5207/files/54724301390.pdf
    • https://cdn.shopify.com/s/files/1/0431/6554/8705/files/1664826599.pdf
    • https://cdn.shopify.com/s/files/1/0430/4440/5397/files/xadolujobuzuduxepafuselo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3989/0327/files/66229290251.pdf
    • https://cdn.shopify.com/s/files/1/0437/0504/1051/files/cambridge_igcse_chemistry_workbook_third_edition_answer_key.pdf
    • https://static.usrfiles.com/ugd/b8c837_d651e23ab92a46b288ddd990eec6e769.pdf
    • https://static.usrfiles.com/ugd/de60da_8dc1ca3f2ad141eb84f61fa1d000a720.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e8723e5c2844bbfaa6b46d80c58e448.pdf
    • https://static.usrfiles.com/ugd/82e28d_d0525337e4f8486caca34214da508224.pdf
    • https://static.usrfiles.com/ugd/d94ae5_e9369b346b0e4eb5a694c6e0196e6d20.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_off00009871.bin
3eacadc82aa7a5e82b72eeceac4bde7b7baaec7d1e33edf630ba497bd9a313cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9871 5880 bytes
font_01_sfnt_off0000ac1a.bin
60eb810f41c3db66f2f3ff38c6666bf02d137f4910001b20ab20d1718720a802		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC1A 15788 bytes

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