Malicious PDF — malware analysis report

Static analysis result for SHA-256 738e711a9cee7a28…

MALICIOUS

PDF

36.6 KB Created: 2020-09-07 07:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30062a40e9633dd0cfa5935db2885770 SHA-1: 8884a7f7450200ce9d2ca1368a2b18477870d490 SHA-256: 738e711a9cee7a28eb31cb077e124f849d3c1f5bbef5a5680cae665fc58a8835
154 Risk Score

Malware Insights

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

This PDF document contains numerous links, masquerading as design templates, which redirect to malicious infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that at least one of these links points to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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.link/wix?keyword=psd+templates+for+vintage+poster
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/copperplate_calligraphy_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/8300/5078/files/cahier_de_recette_informatique_en_anglais.pdf
    • https://cdn.shopify.com/s/files/1/0434/7383/0048/files/89633736278.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7266/files/16623025830.pdf
    • https://cdn.shopify.com/s/files/1/0431/7646/0447/files/vapour_absorption_refrigeration_system_nptel.pdf
    • https://cdn.shopify.com/s/files/1/0440/0742/4158/files/52920037864.pdf
    • https://cdn.shopify.com/s/files/1/0450/9119/2985/files/agile_methodology_introduction.pdf
    • https://cdn.shopify.com/s/files/1/0431/1855/9389/files/xadejupogo.pdf
    • https://static.usrfiles.com/ugd/ea2c45_1ef6311095cb461abbb04bd413b1ad30.pdf
    • https://static.usrfiles.com/ugd/a2e20a_082dca5590514ecfa2b4c6bf11ff894f.pdf
    • https://static.usrfiles.com/ugd/aec2ea_d13c2883705b4629be35fb9218fafc06.pdf
    • https://static.usrfiles.com/ugd/b8c837_8391d399524e49a5851cc79f6c8e9f19.pdf
    • https://static.usrfiles.com/ugd/c75f60_988d49501d034b2dacdde315e206eadc.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_off0000541b.bin
5eb531827d987ab7bc53267efa5b2fb30d09fc581975675b1d69f231fbcd20d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x541B 5424 bytes
font_01_sfnt_off0000667f.bin
f4a0bfed642d28b48549061647bdc7e40ee236b9786976f71e7ac25d021fd3fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x667F 9132 bytes