Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da3335bf31a6565…

MALICIOUS

PDF

35.1 KB Created: 2020-08-29 22:14:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee599e9b01cb9d665f60eeec81635528 SHA-1: 302d767d5709b19e2d9883d1e9b1617a7c75827c SHA-256: 0da3335bf31a656514fed42eee0c14370312147e1269c67012ae16edfee4e8dc
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a redirector URL associated with malicious activity. The document body and heuristics suggest a lure for downloading an APK, likely a social engineering tactic to trick users into visiting malicious sites. The presence of multiple PDF links, some benign and some malicious, indicates a link farm strategy.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/wix?keyword=gangstar+mv+original+copy+apk
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/3195/1517/files/dictionary_of_medical_acronyms_and_abbreviations.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7308/files/botifope.pdf
    • https://cdn.shopify.com/s/files/1/0427/4556/1254/files/dekojenaxito.pdf
    • https://static.usrfiles.com/ugd/b8c837_add80f69af7b45b2aad35d6e86247471.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_bf74f6654e6c488ab4a7c3c31bb87f74.pdf
    • https://static.usrfiles.com/ugd/b8c837_c40bed4106164791b4c1f9a8b5d2d4de.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_ba4775a85b3d4b79ad56c22a4ded33d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_1bf73c9469a149e29844297101e16ec4.pdf
    • https://cdn.shopify.com/s/files/1/0434/0842/5123/files/kogupuvebubalopotexerif.pdf
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/xubujerik.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8811/files/kogazedobepu.pdf
    • https://cdn.shopify.com/s/files/1/0436/5864/1561/files/antinuclear_antibodies_test_reports.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0750/files/wizesebajuze.pdf
    • https://cdn.shopify.com/s/files/1/0436/4818/8569/files/kadakifanijapasinovovu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/20289387623.pdf
    • https://cdn.shopify.com/s/files/1/0433/5858/4986/files/kaselub.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_off000049c6.bin
c4eb14628ebb2023edbc20275363a7a08cc32739ca3e7ae40be12210afdbaf07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49C6 5508 bytes
font_01_sfnt_off00005c83.bin
44a8f62ee107c0735c89b56fbb0269c8ad4d9dbc04fdb20ff322fd8669de40c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C83 10336 bytes

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