Malicious PDF — malware analysis report

Static analysis result for SHA-256 699e62306e0a0905…

MALICIOUS

PDF

51.6 KB Created: 2020-08-19 17:14:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d36400d6660fed297cccf5ff0417dc85 SHA-1: 6b28b8716bdcc980a8b6095089fd64d6748fb4b0 SHA-256: 699e62306e0a0905acde3a55aabccaabc1fb7c18f71ae0e495e3f79f4fc301d2
162 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one pointing to a known malicious redirector infrastructure at 'ttraff.cc'. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to improve SEO for malicious sites.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=canon+t5+manual
    • http://files.tonyhardindesign.com/uploads/1/3/0/9/130969761/vovorawimigidugowij.pdf
    • http://files.2dskihorsemanship.com/uploads/1/3/2/7/132740620/rotejifozokono.pdf
    • http://gusekegur.bizoncustoms.com/uploads/1/3/1/4/131436967/potumamaliremoludowu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2050/7546/files/2179875054.pdf
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/ftb_academy_mod_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/5027/0869/files/lukizirixurafa.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/nokizox.pdf
    • https://cdn.shopify.com/s/files/1/0438/1802/5122/files/fruit_personality_test.pdf
    • https://cdn.shopify.com/s/files/1/0430/1576/6177/files/gegivelofogukulewuguzawen.pdf
    • https://cdn.shopify.com/s/files/1/0438/1881/1552/files/latex_in_jupyter.pdf
    • https://cdn.shopify.com/s/files/1/0447/0842/9977/files/jovudadasodepapezigi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5081/8981/files/95844111716.pdf
    • https://cdn.shopify.com/s/files/1/0437/2257/1930/files/57291081660.pdf
    • https://cdn.shopify.com/s/files/1/0440/7659/7400/files/60021511371.pdf
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/bloons_td_6_apopalypse_guide.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_off00008333.bin
b34447e603282038ad03c269fbe3d97928e49943f4cbc52c0f9b7ad198071554		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8333 4584 bytes
font_01_sfnt_off000092b6.bin
cab9276e50fb508b91250fdde94ab0236318ce63023573d926607434ff6e7975		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92B6 15316 bytes

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