Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f536315250d8bc…

MALICIOUS

PDF

45.2 KB Created: 2020-08-30 09:14:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3327cdf9ddcd11a78e3817b61b60b1c SHA-1: 5fb904d19a24bd19004fd22a462194ca42783598 SHA-256: 02f536315250d8bcd1edae3d73ab0b802f25c3d1035e55c30c766853288dc103
154 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a known malicious redirector, suggesting a phishing or scam attempt. The ML classifier strongly indicates maliciousness. The document body, though partially garbled, contains the URL and a lure for 'free arabic online lessons', reinforcing the phishing pretext.

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.com/wix?keyword=free+arabic+online+lessons
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_e00ace3268334000b1725d70fca79147.pdf
    • https://static.usrfiles.com/ugd/77d535_91f24e6d05724439ad82180d14ebf323.pdf
    • https://static.usrfiles.com/ugd/67e251_eccafc111acc45c18f4816fb4bbaef4c.pdf
    • https://static.usrfiles.com/ugd/7ef0dc_78e13b5b38ed4646a6f38ff9cb7a1573.pdf
    • https://static.usrfiles.com/ugd/173616_1506277022764e7790389a99247c165f.pdf
    • https://static.usrfiles.com/ugd/05900a_be37868b6afa4dcbbdb733bdeb67d2de.pdf
    • https://static.usrfiles.com/ugd/b8c837_41f77f6964174f279e88c00b328106d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_7623674079ae4d38a386c18a331a61c8.pdf
    • https://static.usrfiles.com/ugd/dc98cc_e5f7b5e4eed648e68aa7b30870b19b94.pdf
    • https://static.usrfiles.com/ugd/edb4a7_7da7e37d3f904ee7ade44aec1e95aee9.pdf
    • https://static.usrfiles.com/ugd/8a419d_8134fe554462474cb8661d75a5076e4e.pdf
    • https://static.usrfiles.com/ugd/b8c837_b06a2d3d25fc4f509533f5b8e18b48a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_559195fe310343769ccc0ecd72120be9.pdf
    • https://static.usrfiles.com/ugd/d55797_9eb1ca2e76c0409590a225e11755b473.pdf
    • https://static.usrfiles.com/ugd/b8c837_1de383fdc8ff445f9343ab234c04cb5e.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_off0000741e.bin
ec91cecd60fdc9f75c59a4f85b41a26c3b097a309f311a4bbadebda8850a92fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x741E 4888 bytes
font_01_sfnt_off000084c4.bin
7762714a7d71dace0dab33447d71fd71e134347feb0b37db0bc43de532174597
pdf-font-stream PDF embedded font (sfnt) at offset 0x84C4 10360 bytes