Malicious PDF — malware analysis report

Static analysis result for SHA-256 7addb6d152d799cd…

MALICIOUS

PDF

40.5 KB Created: 2020-09-11 17:40:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ed7d4c356686246a79882a00e4fb66f SHA-1: 719da31c640bd1dea57c832b55f9092d636fe43d SHA-256: 7addb6d152d799cdf60659209164f3e07132d49f8eb602247820c421ebccb114
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be a lure for users searching for specific software. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful sites.

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.club/wix?keyword=analysis+toolpak+mac++free
    • http://wadenej.zsuzsitoth.com/uploads/1/3/0/7/130775734/6892add912227c.pdf
    • http://gotujuxu.gyrobot.co.uk/uploads/1/3/1/6/131606289/nufexoliduvot-ziwutagovid.pdf
    • http://files.crystal-violet.com/uploads/1/3/1/8/131871484/4588107.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/48025182001.pdf
    • https://static.usrfiles.com/ugd/086daf_35ef415f5fd04980a8d7e53464d94c23.pdf
    • https://static.usrfiles.com/ugd/b8c837_59faa54f4929421b8ef1af17bd4c860f.pdf
    • https://static.usrfiles.com/ugd/2b25e8_f322b2f1fc9d4f528eb6a883b336a2c5.pdf
    • https://static.usrfiles.com/ugd/6240f8_c9650ac36dee40ea86040bdc6b0aaad7.pdf
    • https://static.usrfiles.com/ugd/2c8d66_5242c0ddcc7649c8bf5a2aeb0da31700.pdf
    • https://static.usrfiles.com/ugd/95b9ea_e208be2a302e45cfa8e859e95b71193e.pdf
    • https://static.usrfiles.com/ugd/9cc572_5b32a66e72d849b1983198e2d0f2b6e9.pdf
    • https://static.usrfiles.com/ugd/374ce0_23d1e2825f1b4d0a9bf8adebf8bb15b9.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_off00005fce.bin
c174eaa19ea576bdc45937982c637351b2c699c765263aeaf15c94dfc6a9777d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCE 5316 bytes
font_01_sfnt_off000071e1.bin
e26f608895043ff4e8e881c31367ca36816ad2c03353d86b01647f0f1c3a0971
pdf-font-stream PDF embedded font (sfnt) at offset 0x71E1 10716 bytes