Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ca15343259015e9…

MALICIOUS

PDF

41.9 KB Created: 2020-08-24 19:55:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a09030f0a081285c121f1b914b3933a5 SHA-1: 5178f05db2be6eebcffb0edae38d3fd086e654fc SHA-256: 5ca15343259015e967aa287c0bcf561c3ecd8b913ce756ab085f217eccd02cea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link disguised with movie-related keywords that redirects to a known malicious domain. It also exhibits characteristics of a link farm, with numerous embedded links pointing to various PDF files, likely for SEO manipulation or to host further malicious content. The ML classifier strongly indicates maliciousness.

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.com/pify?keyword=alaipayuthey+tamil+movie+all+songs
    • http://xefopu.charlenemosley.com/uploads/1/3/1/4/131438044/naxililer_remepavukuvate_jimigojovuke.pdf
    • http://files.weitzelphotography.com/uploads/1/3/1/4/131437676/44b6fbd7a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/2076/0741/files/bobcat_sweeper_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/3847/4397/files/motadovilevifirojek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19441108854.pdf
    • https://cdn.shopify.com/s/files/1/0438/3644/0733/files/85046755799.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/lifofu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/puratogafule.pdf
    • https://cdn.shopify.com/s/files/1/0428/1139/2167/files/5th_grade_math_worksheets_cbse.pdf
    • https://cdn.shopify.com/s/files/1/0462/7477/3152/files/cv_template_uk_personal_statement.pdf
    • https://cdn.shopify.com/s/files/1/0428/6880/1695/files/xekelop.pdf
    • https://cdn.shopify.com/s/files/1/0431/0617/3077/files/76124910350.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_off000065c9.bin
6d052cd3170da96aecf0061b824555b5c63d0eb84e83b8648254f96fc91532ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x65C9 5288 bytes
font_01_sfnt_off000077bb.bin
e7446dc729142f21fc8b7d0a98505e353ba0712cbfcd3270658149db0379ad83
pdf-font-stream PDF embedded font (sfnt) at offset 0x77BB 10316 bytes