Malicious PDF — malware analysis report

Static analysis result for SHA-256 6385fa61e960d224…

MALICIOUS

PDF

41.0 KB Created: 2020-08-31 11:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 651e1770154a78f7234ca97458bc47cb SHA-1: a345fff72f0b399ebaef8723e8a5911f8d47adb2 SHA-256: 6385fa61e960d2245d3cd0106cc78e198a05b4d43037addfde2f0f41acb5251b
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.cc/wix?keyword=fable+3+pc+crack, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and references 'fable 3 pc crack', indicating a lure for illegal software downloads. The presence of numerous other links to static.usrfiles.com suggests a link farm intended to boost SEO for malicious content.

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=fable+3+pc+crack
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/01bc73_94adc0737fe345688187402d3dd5273f.pdf
    • https://static.usrfiles.com/ugd/6350c7_b30bd5ad9a16434598ac693cca929750.pdf
    • https://static.usrfiles.com/ugd/67e251_1587b246567e46adad3088645aec128a.pdf
    • https://static.usrfiles.com/ugd/2813e2_dc0f867c179744519428d1d2e4b8f371.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0ec9d01b5224ac2b0db595c21313d7c.pdf
    • https://static.usrfiles.com/ugd/b8c837_d422ec1068354474a274f0a8a3d3554d.pdf
    • https://static.usrfiles.com/ugd/71fd01_e208bedab3e7493e9f4637f26e9d0252.pdf
    • https://static.usrfiles.com/ugd/739437_545ec1e3ed6d4078a2ab7867b665d6ef.pdf
    • https://static.usrfiles.com/ugd/21e6f2_5692e4a5db694536a31e71094b68db4e.pdf
    • https://static.usrfiles.com/ugd/3b47cb_599de332ae9c45ba824846a114d95ac6.pdf
    • https://static.usrfiles.com/ugd/b8c837_077e278c17bf4e66a40d68766f480c64.pdf
    • https://static.usrfiles.com/ugd/b8c837_574478db8c164d8684529770df75ca34.pdf
    • https://static.usrfiles.com/ugd/3eed2b_11e85de8e500436cb7a58c930555d25e.pdf
    • https://cdn.shopify.com/s/files/1/0433/4937/7177/files/flight_simulator_2017_flywings_free_hack_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/18156852108.pdf
    • https://cdn.shopify.com/s/files/1/0435/7029/9048/files/4026308628.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_off000062a9.bin
209a0a596a16afb586748ef13c18a2f4eb128cdfd566d1243243e4f34d1005d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A9 5072 bytes
font_01_sfnt_off000073f9.bin
ca483af9e8c5ed645ba53ba086ff8c69da31e67e6f00af36619e4e07587d8be5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F9 10516 bytes

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