Malicious PDF — malware analysis report

Static analysis result for SHA-256 71f7fbdf9aac78b6…

MALICIOUS

PDF

33.4 KB Created: 2020-08-31 08:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5886e73148c7c2024a032b75a2248187 SHA-1: c4bc29677ccc29790cedad0f0232c2e810d33dd3 SHA-256: 71f7fbdf9aac78b684edcadce312d2ae1f4b53b74b3df5c888ee648d9ab98687
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.cc/wix?keyword=johnnie+taylor+only+my+woman+can', points to known malicious redirector infrastructure. The presence of this link farm suggests an attempt to lure users to malicious sites, potentially for phishing or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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=johnnie+taylor+only+my+woman+can
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/a4d998_0e16434cb1444561b784e6f938b02281.pdf
    • https://static.usrfiles.com/ugd/df73ab_53a8ff8b2323478680ffefa5cb1a2163.pdf
    • https://static.usrfiles.com/ugd/8c0e65_46324a0964894867bb24bc736f577780.pdf
    • https://static.usrfiles.com/ugd/b8c837_66ec3798ae87428899dc1dce723c1f64.pdf
    • https://static.usrfiles.com/ugd/10b11f_f9c13a97a82145968e88f822bbff1894.pdf
    • https://static.usrfiles.com/ugd/b8c837_9490d807a9c14e7681b3e272921e6020.pdf
    • https://cdn.shopify.com/s/files/1/0433/9813/5966/files/mechanics_of_materials_riley_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0453/2440/2843/files/pogalaviguwulazexuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/dell_precision_5820_spec_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riwemabosemuridaredexe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3330/4986/files/18919175821.pdf
    • https://cdn.shopify.com/s/files/1/0430/0292/1123/files/cramer_s_rule_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/7036/5602/files/the_age_of_sustainable_development_jeffrey_sachs_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/0835/8561/files/58797481099.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_off00004703.bin
027ee5316ace6d79f95a62618b435ae46118977e0bcb8512344f9cf73275887a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4703 5044 bytes
font_01_sfnt_off0000580f.bin
30e9aebc35bb624960ebc61e0c56db059d1e2cf813cffa9fa6d1edfe994ae189
pdf-font-stream PDF embedded font (sfnt) at offset 0x580F 9576 bytes