Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e57a8c68e339b66…

MALICIOUS

PDF

47.4 KB Created: 2020-08-28 21:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da753acbf04a6c267a8913291f62e2d8 SHA-1: 6b80d2bfdbb76929615039682195e1b2465aedee SHA-256: 0e57a8c68e339b66c942eb33966c230b62ec0c031622b2908b8681b37ec0d56f
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or redirection scheme. One prominent URL, 'https://ttraff.ru/wix?keyword=fallout+4+load+order+ps4', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and references to 'powershell_reverse_shell.pdf', indicating a potential attempt to download and execute further malicious content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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=fallout+4+load+order+ps4
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3260/7894/files/48450666901.pdf
    • https://cdn.shopify.com/s/files/1/0440/4684/4054/files/98144007550.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1384/files/powershell_reverse_shell.pdf
    • https://cdn.shopify.com/s/files/1/0430/6481/9874/files/kimebefi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2564/5211/files/duzowopiwe.pdf
    • https://static.usrfiles.com/ugd/b8c837_33e1cc63d4504eafa87113d5abcd29bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_82eff5da619c43febc61b3dbc129ae41.pdf
    • https://static.usrfiles.com/ugd/b8c837_d3b7170ea93f486198b35239bbecb89d.pdf
    • https://static.usrfiles.com/ugd/b8c837_31eafa4a4833453b89353e055376cbda.pdf
    • https://static.usrfiles.com/ugd/b8c837_b3d1e5b9c4dc424298829ba826c98630.pdf
    • https://static.usrfiles.com/ugd/b8c837_734f0021fc9e4a6093b275344b3cafcb.pdf
    • https://static.usrfiles.com/ugd/b8c837_26b44f289cf9405e9b6eb01e7ceb64d3.pdf
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/colt_mustang_review.pdf
    • https://cdn.shopify.com/s/files/1/0434/5764/2648/files/79094684950.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/
    • https://cdn.shopify.com/s/files
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007bfe.bin
82ad73bdcf89c13c1f9b07f839cbdb43e43ab022881058d80e56e814f51ac044		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BFE 4996 bytes
font_01_sfnt_off00008d09.bin
624126c2e5e7bb248cf255c9cb23866f0feb1adfdd1f19d31a7d5974a3605fa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D09 10588 bytes

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