Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee8439f9a8d09c8…

MALICIOUS

PDF

40.2 KB Created: 2020-08-20 12:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5320c0b1ba8a58114995a11bf1757921 SHA-1: 00da5b83e24a9aa56a93e5fa887cedae583139d7 SHA-256: 0ee8439f9a8d09c85113b4b5b0e80e2fa705124d6d0549bc2c3bd7d9db0d6400
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=martin+fowler+enterprise+integration+patterns+pdf', which is a critical finding. This suggests the document's primary purpose is to redirect users to potentially harmful content, likely as part of a phishing or malware distribution scheme.

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/pify?keyword=martin+fowler+enterprise+integration+patterns+pdf
    • http://tazaz.frecklefaceboutiques.com/uploads/1/3/2/7/132740930/5830071.pdf
    • http://files.retrogunx.com/uploads/1/3/2/6/132680931/todewenexa-gutefokamofiba-kujidadejalor.pdf
    • http://wawutebi.alightoftruth.com/uploads/1/3/1/3/131380005/9437776.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6059/1776/files/classroom_based_action_research.pdf
    • https://cdn.shopify.com/s/files/1/0433/9505/5766/files/pakijini.pdf
    • https://cdn.shopify.com/s/files/1/0444/8750/8135/files/muvirivonat.pdf
    • https://cdn.shopify.com/s/files/1/0428/2351/6323/files/95544046342.pdf
    • https://cdn.shopify.com/s/files/1/0433/9944/6693/files/97379233482.pdf
    • https://cdn.shopify.com/s/files/1/0433/6533/5190/files/abiotic_vs_biotic_factors_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/protocolo_arp_y_rarp.pdf
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/aquelarre_juego.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/2.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_off00005fb8.bin
3b2989d4a3e4a8b8cd7af050ba57e7c1b65d4f34abda6593a60cb9324bf3b14c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB8 5304 bytes
font_01_sfnt_off000071eb.bin
f5de4eff960860cbf0b538f3e7454697b8e280658ace9991faa72ed0ab6a76ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x71EB 9896 bytes