Malicious PDF — malware analysis report

Static analysis result for SHA-256 045276c757dc071e…

MALICIOUS

PDF

39.6 KB Created: 2020-08-30 11:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5919898fd75da99dca7921e71a92df4e SHA-1: 691f7db5da0812017f6a880b5a475dc3434fc532 SHA-256: 045276c757dc071e0400d7ce2bbde2a3f47b5031d515dcf10a6142f0a1a49ba5
162 Risk Score

Malware Insights

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

This PDF document contains a link farm and a redirector to malicious infrastructure, indicating a likely SEO spam or phishing campaign. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=etumax+royal+honey+como+se+toma' and numerous other PDF links, suggesting an attempt to drive traffic to potentially harmful content. The ML classifier also 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=etumax+royal+honey+como+se+toma
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/cc089a_3db2d309982946aca6dff0df8a509049.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5b6b2e2ebab4cee956829f534e28626.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a04c6800a3d42cba81c15989a73913a.pdf
    • https://static.usrfiles.com/ugd/0f5b72_fa853338c3804d47a6617ea23a2819cd.pdf
    • https://static.usrfiles.com/ugd/b8c837_3675fb5c98b3446fbc976eeab6f6743e.pdf
    • https://static.usrfiles.com/ugd/b8c837_d26a20e73f614ce597cdf42293637a9e.pdf
    • https://static.usrfiles.com/ugd/69b86f_2b0b39f4183b4e8996c639a32314f021.pdf
    • https://static.usrfiles.com/ugd/906e9f_2828248af6f245ff88b7636dc8fbf2aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_811a76de6e2a46d895548fab17035b52.pdf
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/58275518650.pdf
    • https://cdn.shopify.com/s/files/1/0465/9619/4469/files/algorithm_tutorialspoint.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_off00005cfb.bin
df88529790a0119a044305b65da7d65e1df8c8bc0f7763f1a34717b500a9384b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CFB 5164 bytes
font_01_sfnt_off00006e6f.bin
a2a8b9d89d4e0e304dbe63fd63b432679d0e5b492dee0d2b01eb60040b44769f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6F 10600 bytes