Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b62303a985df775…

MALICIOUS

PDF

47.2 KB Created: 2020-08-20 18:10:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9da3594f8d0cdd9bb3710d42b123e42 SHA-1: 6f992b82161ca90afb126502b942f4a9cb15d0a0 SHA-256: 6b62303a985df775309d1952636756678bc7e517ed6c939f0da74c29932e35e2
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a lure to external content. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple external links, including a large link farm, indicates a potential SEO poisoning or phishing attempt.

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/pify?keyword=case+conceptualization+template+cbt
    • http://files.brendargarcia.com/uploads/1/3/1/1/131163976/6670643.pdf
    • http://files.sorrowfulmother.net/uploads/1/3/2/6/132680822/ab2206.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2437/5194/files/dapidomeroxaboxewukepaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/5646/3014/files/63955472399.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/62946218009.pdf
    • https://cdn.shopify.com/s/files/1/0434/2156/5078/files/lonagobovuvuwi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9174/5175/files/60522862880.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/banen.pdf
    • https://cdn.shopify.com/s/files/1/0427/4490/5884/files/error_permission_denied_dir_s_mkdir_usr_local_frameworks.pdf
    • https://cdn.shopify.com/s/files/1/0440/5238/1846/files/zisaruwijur.pdf
    • https://cdn.shopify.com/s/files/1/0430/5004/1495/files/angela_carter_the_magic_toyshop.pdf
    • https://cdn.shopify.com/s/files/1/0429/2896/3747/files/bikisogeperakevekerusotot.pdf
    • https://cdn.shopify.com/s/files/1/0433/5504/6037/files/associativismo_e_organizaes_voluntrias.pdf
    • https://cdn.shopify.com/s/files/1/0431/1639/6695/files/zuwigibifete.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_off00007cb8.bin
d7189f6743c97cd3f1225f16edd5e87de6c12f9de1fefce3f181ef2b30828994
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB8 5076 bytes
font_01_sfnt_off00008de7.bin
132f6da913b2a3cf12489715067eba7eff38ac7e41c98d3f29be129f682174d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE7 10076 bytes