Malicious PDF — malware analysis report

Static analysis result for SHA-256 c23a2e2356982340…

MALICIOUS

PDF

38.9 KB Created: 2020-09-01 07:17:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e36ffd1ec34254da70f869aec019fd8e SHA-1: 6983ed30c232489f470234e1ae7b810690138dad SHA-256: c23a2e2356982340b9c3dcdfc3a705005936a8bbdfd6b78b6b7bc5c5d82eec68
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=advance+wars+emulator+android'. The document body, though heavily obfuscated, appears to contain text related to the search query and the malicious URL, suggesting a social engineering lure. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.com/wix?keyword=advance+wars+emulator+android
    • https://static.usrfiles.com/ugd/9ff9b8_098bc720a0c64652a3c971e8219654bf.pdf
    • https://static.usrfiles.com/ugd/0511f5_6bc8bfb10f304a27b5b71f9101e2e3e4.pdf
    • https://static.usrfiles.com/ugd/d902bb_ff487966cdd94fc3874fe2c92c5fac31.pdf
    • https://static.usrfiles.com/ugd/b8c837_9fd49c83dee04e82a9ad8695ef5cdc45.pdf
    • https://static.usrfiles.com/ugd/10e3af_424fc344f45b4ad69c555ffa0a0b0a8c.pdf
    • https://cdn.shopify.com/s/files/1/0431/1033/4620/files/calabozos_y_dragones_juego_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0750/files/48932216138.pdf
    • https://cdn.shopify.com/s/files/1/0434/6239/4021/files/ace_hardware_informa_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/gejotufudufu.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005999.bin
f58752397dcd958e45b2665592eddb16824522678e70c55e0595aa1b213e1b7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5999 5224 bytes
font_01_sfnt_off00006b5c.bin
0c841d3e5844edf4cc8f41bd1d9403e787ffd4ef5eab8f183ce368f6bfd4edff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5C 10544 bytes

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