Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dd49624cef1c56f…

MALICIOUS

PDF

63.1 KB Created: 2020-08-04 16:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ef963af253a22911bc64d7b784c1c0d SHA-1: c7c233a0fd7b3963f0dc426ee85dc4e071e5869a SHA-256: 6dd49624cef1c56fde0e558bd7445a9faf8b5b66de60e070789f40baf2f5d8e8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, with one prominently pointing to 'ttraff.com/pify', identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'problem solving methods in artificial intelligence pdf' and the malicious URL, suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm or SEO manipulation tactic to distribute malicious content.

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=problem+solving+methods+in+artificial+intelligence+pdf
    • http://files.kristiekvuocolo.com/uploads/1/3/1/4/131407148/4932d.pdf
    • http://files.merarifernandez.com/uploads/1/3/1/4/131407165/6839308.pdf
    • http://files.badcredentials.com/uploads/1/3/0/8/130814157/ratadasa-wevuregexavet.pdf
    • http://lutoroni.audreylynnecook.com/uploads/1/3/0/7/130776257/zaxivifiguxo.pdf
    • http://files.jerryjonesguitars.com/uploads/1/3/1/4/131408172/5095027.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5731/4983/files/alveolektomi_jurnal.pdf
    • https://cdn.shopify.com/s/files/1/0432/6778/4864/files/rigituze.pdf
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/74000859042.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/kigemaboragebibixir.pdf
    • https://cdn.shopify.com/s/files/1/0435/7737/6936/files/jasamojamujuzadon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0297/7700/files/85922233987.pdf
    • https://cdn.shopify.com/s/files/1/0428/9649/0663/files/2002_ford_taurus_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/2379/3308/files/fegogufumeli.pdf
    • https://cdn.shopify.com/s/files/1/0428/0477/3031/files/college_physics_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/3397/7255/files/jejuximejoje.pdf
    • https://cdn.shopify.com/s/files/1/0434/7779/4982/files/vejirim.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_off0000b89d.bin
f358216b7c41d70e83d4909a031d5405bd04c9c22722fcbd0bc9051ef09a3bc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB89D 5768 bytes
font_01_sfnt_off0000cc1d.bin
10b35b23ebfec1718b52d04cda611ef311a72fdb0bb98bf4b016fbbbe9407a67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1D 10140 bytes

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