Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae3ac782b11ba03…

MALICIOUS

PDF

41.2 KB Created: 2020-08-29 18:07:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b1282f8e413a188d57c881cb66d1d7c SHA-1: af07f800465a915dd690d208fdce3ef8b257fa89 SHA-256: 0ae3ac782b11ba03bf0b2e60acbda457c12a34c2662b7c181bbb150cbb85eae1
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/wix?keyword=marvel+vs+capcom+2+ps2+save+file', is flagged as a malicious redirector. The document also exhibits characteristics of a link farm, with numerous external PDF links, suggesting an attempt to drive traffic to various sites. The ML classifier strongly indicates maliciousness, supporting the conclusion that this PDF is designed to redirect users to harmful 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.ru/wix?keyword=marvel+vs+capcom+2+ps2+save+file
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_1ff3186acd834b2e8529789e18225bd5.pdf
    • https://static.usrfiles.com/ugd/b8c837_79071bb9b1ac4951a61a64a71f60a9a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_a8d42a2cdc334486ab30289d205be209.pdf
    • https://cdn.shopify.com/s/files/1/0430/1901/0201/files/74742221205.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8190/files/nusejasuwiwagedibapixerus.pdf
    • https://cdn.shopify.com/s/files/1/0431/5319/5157/files/47264152353.pdf
    • https://cdn.shopify.com/s/files/1/0430/9729/2949/files/vemoriramojaniteg.pdf
    • https://cdn.shopify.com/s/files/1/0435/5260/4328/files/gasidebixunu.pdf
    • https://cdn.shopify.com/s/files/1/0463/2946/2945/files/operating_system_concepts_8th_edition_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/6663/9014/files/dot_net_framework_3._5_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0437/1431/4405/files/real_mathematical_analysis_springer.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/84067272494.pdf
    • https://cdn.shopify.com/s/files/1/0438/1274/9469/files/89334887784.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tesip.pdf
    • https://cdn.shopify.com/s/files/1/0429/6992/3740/files/21402606135.pdf
    • https://cdn.shopify.com/s/files/1/0431/9910/3136/files/lunenuvarakexakuxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/4419/9829/files/musixusejunujefilo.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_off000061a1.bin
c4883db6b408ae074fbab3a25305468f766487601af622b4619c706f46068eea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61A1 5360 bytes
font_01_sfnt_off000073d5.bin
abbf690273d3e3922ac5de764f15d4052b5de1dfaaef18ea73172bc1803914f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D5 10512 bytes

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