Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c5a2d9d79d8bf4…

MALICIOUS

PDF

60.5 KB Created: 2020-08-10 04:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb0f321d2f3d47474073afba34d2ebe6 SHA-1: e23c27e8d47a86a5acc74fff8edb4eee682f5f15 SHA-256: 60c5a2d9d79d8bf48cfceb0049dfd6d3692afd12e78d4af7a5225e7ed3f73941
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a link farm and a redirector. The primary malicious URL, 'https://ttraff.cc/pify?keyword=branches+of+agriculture+and+their+definitions+pdf', is designed to redirect users, likely to a phishing or malware distribution site. The document body, though heavily obfuscated, contains this URL, suggesting an attempt to disguise malicious activity under a seemingly innocent topic.

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=branches+of+agriculture+and+their+definitions+pdf
    • http://files.southcoastshipyard.com/uploads/1/3/1/6/131637658/dumul_samazovis_nalewexe_ragoxibunaminoj.pdf
    • http://mefaweval.mmfadocents.com/uploads/1/3/0/7/130776728/7693055.pdf
    • http://files.levental-lab.com/uploads/1/3/0/9/130969254/pupuvavofufo_vusoxexolubovi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/8406/9526/files/change_to_word_file.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46552055365.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/babape.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dipudakafadaned.pdf
    • https://cdn.shopify.com/s/files/1/0432/8262/8766/files/32811080242.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/best_acknowledgement_for_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/9450/6661/files/past_perfect_past_continuous_past_simple_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0435/2560/3488/files/kikekibamekuvemonevewo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7001/4111/files/rolupa.pdf
    • https://cdn.shopify.com/s/files/1/0439/4021/6987/files/watson_glaser_critical_thinking_test.pdf
    • https://cdn.shopify.com/s/files/1/0440/5772/3030/files/cambios_sociales_en_el_adulto_mayor.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6580/files/algebra_2_factoring_practice.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_off0000af62.bin
f758961615353c24c621f87a0561249e8c91da03dde0e282a0a72985e70d5c15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF62 5468 bytes
font_01_sfnt_off0000c1f7.bin
838267862d6bdf4bf9e01ff71d0e484ea5a41bb7246f1084f11a3f0465aad014		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1F7 10240 bytes

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