Malicious PDF — malware analysis report

Static analysis result for SHA-256 747aa2ae975ea7d0…

MALICIOUS

PDF

42.8 KB Created: 2020-08-29 20:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8451030c1d49886e4fb1ba21e6bbf6c7 SHA-1: 142d422bfc06aba45a45a45e7a8d834f2d192d8c SHA-256: 747aa2ae975ea7d0bd95ea4b598165ae5628d0e081063ab9fe36269422a15631
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the redirection. The presence of numerous external PDF links suggests a link farm intended to obscure the malicious destination. No scripts were extracted, but the primary malicious functionality appears to be the redirection to the identified URL.

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=adventurer+conqueror+king+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_7547b62a960b4f7ba97de62b12829a1d.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f843f2230d04802a9bf72260ef7aaef.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0bb93717ae547a483ecad8353f8e0f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_80fc8956b0284f16be8a7e13681e53e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_6aecdae74ae14960af658b92618a68f8.pdf
    • https://static.usrfiles.com/ugd/affb4a_a9002859a7894880b8df610caf082d6c.pdf
    • https://static.usrfiles.com/ugd/8de238_a2d23a2d912840aca83175f95274d171.pdf
    • https://static.usrfiles.com/ugd/c7ef1a_40a1bda1cd2d4511a827e7b6611e56c9.pdf
    • https://static.usrfiles.com/ugd/a76634_09f78643dc07460f96ec81059a0ce042.pdf
    • https://static.usrfiles.com/ugd/c7a620_b3090a11d0ac4c0482eb58d6adbc1130.pdf
    • https://static.usrfiles.com/ugd/b8c837_3bf7263bb05a4677a9a3ee81b261f641.pdf
    • https://static.usrfiles.com/ugd/1e32c2_d0ed6de7a59943b39899dd9e10a05daa.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ea1c3959d844548b409d93a3d539406.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a51.bin
57b372501b06115160720b1d55c56c9b2ec48a4ecd586baa9766ea5c293b7038
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A51 5024 bytes
font_01_sfnt_off00006b70.bin
296622af7c26d8a4c8ab669702c836fa94ef2d2b67af82de6faef7d805f7ff63
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B70 11016 bytes
font_02_sfnt_off00009091.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9091 4324 bytes