Malicious PDF — malware analysis report

Static analysis result for SHA-256 64754be272b7b750…

MALICIOUS

PDF

41.1 KB Created: 2020-08-31 11:54:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0194a1f4a5c4eecb7940ae3c15ff14b SHA-1: c56e810f911579c6a5bafccb1d9c357c6d57bccf SHA-256: 64754be272b7b75050bd825df5dd4ca5d3d5e78a1830e0d21ccc253894113d10
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and references to game-related terms, suggesting a lure. The presence of numerous external PDF links, many pointing to benign content, suggests a link farm or SEO poisoning tactic to improve the ranking of the malicious URL. 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.cc/wix?keyword=divinity+2+saheila%2527s+people
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/c8a981_2894d4ef2ef84c8786c7ad272190280f.pdf
    • https://static.usrfiles.com/ugd/b8c837_de1982beb60f4633a0fc9de9b3d86fd8.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a5aa4b91117444d966558782b815cbe.pdf
    • https://static.usrfiles.com/ugd/353d00_483ad5e1f6f04d8bbe1b217b6ea1dabb.pdf
    • https://static.usrfiles.com/ugd/f4de5e_14260f3f76554d3b90765b35e20fe1c0.pdf
    • https://static.usrfiles.com/ugd/1be480_fd7c784a284c43f2aa63b4af43caf146.pdf
    • https://static.usrfiles.com/ugd/b8c837_d09ffebd3a0548338f097d7359f8c037.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8ade5e9a72a46d2a013f43be6f77b37.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e96e287717143d9baa199985c5b2211.pdf
    • https://static.usrfiles.com/ugd/097bd5_db47bf33cddb4436a0532854b4a829df.pdf
    • https://static.usrfiles.com/ugd/57c819_b8b2519c53834c59a90144d9ca566be7.pdf
    • https://static.usrfiles.com/ugd/0b46e6_031dba79ff20498191be9356d3f8bd5d.pdf
    • https://static.usrfiles.com/ugd/b8c837_5eed99d82ee74410ab42ccda4f97eaf5.pdf
    • https://static.usrfiles.com/ugd/e8506d_a10345310f744a0c9a3e6b1535b7550b.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f25.bin
d07f3d49c9cced9ba225b5ec5b70b8c2f0e2ee71e1d5c3cb42553f235036627c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F25 1556 bytes
font_01_sfnt_off0000570d.bin
a8d7fa30343d2a9e8b179287876958129877f40752200c27f43baffe87d797b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x570D 4924 bytes
font_02_sfnt_off000067d7.bin
d9f1c166174aaad2daa6e41678deac442d9a262943b2b27ede1c56f8cdee2b41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67D7 9812 bytes
font_03_sfnt_off000088b0.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88B0 4324 bytes

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