Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e4298beb735fe7…

MALICIOUS

PDF

39.9 KB Created: 2020-08-19 08:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78c452fcd87c616d2f9017af3150698d SHA-1: 6aeba02fb7777deaaf0fd3d38157623f88dbf4bc SHA-256: 05e4298beb735fe79197f011c60b07d319ff963951fa884958c261f257c6dd08
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though partially obfuscated, also contains a URL that appears to be part of this malicious infrastructure. This suggests the primary goal is to redirect users to potentially harmful websites, likely for further exploitation or phishing.

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.ru/pify?keyword=bodybuilders+training+videos
    • http://files.thrivewell-being.com/uploads/1/3/2/8/132814147/boxomuxamuzuvusegev.pdf
    • http://komilob.flightsofreality.com/uploads/1/3/0/9/130969060/9255885.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4202/9215/files/aws_solution_architect_exam_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/8887/9521/files/most_used_adjectives_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/42983321392.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/76800861447.pdf
    • https://cdn.shopify.com/s/files/1/0433/3853/0965/files/export_ssrs_report_to_programmatically.pdf
    • https://cdn.shopify.com/s/files/1/0432/2040/2337/files/graphing_rational_functions_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2823/3887/files/menasebipivunutetez.pdf
    • https://cdn.shopify.com/s/files/1/0429/6825/2565/files/luwabanafu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4702/files/acgih_2020_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0435/0686/0187/files/74906091986.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_off00005e8c.bin
a14be619e0fbc9012bb18ffe5ab440567f4a3b8391d6c0fc780460129a2f9ef8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8C 5344 bytes
font_01_sfnt_off000070c6.bin
ca8bd11b20acdefdc9a550da7f8dcba9ed5d475704b71da8745c1fdd67c9d748
pdf-font-stream PDF embedded font (sfnt) at offset 0x70C6 9868 bytes