Malicious PDF — malware analysis report

Static analysis result for SHA-256 1588d75909c7875f…

MALICIOUS

PDF

50.3 KB Created: 2020-08-31 00:44:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 321160928bcc7fe5553c88dd8c4f25c5 SHA-1: dce00183dfcf26079241e91327e67fd7effdb4f3 SHA-256: 1588d75909c7875f553d3b906ef095f5e3de901de95906aa01585fd8776f9058
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.club/wix?keyword=history+of+criminal+psychology+pdf'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous external PDF links. The ML classifier strongly indicates maliciousness, suggesting the document is designed to lead 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.club/wix?keyword=history+of+criminal+psychology+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/6908d7_e31c0ceee3fb4662b255ba55cd1d6891.pdf
    • https://static.usrfiles.com/ugd/19ce5d_db1b3a118a9b459f86af30cdd5c9afff.pdf
    • https://static.usrfiles.com/ugd/63022f_c8b00237c012408a8e7af0cbe3d24abb.pdf
    • https://static.usrfiles.com/ugd/b8c837_d4aa6b52ad8c4f63ba4bd253b9a4b068.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce64934b18b9454eb1cd4b0ec1c38508.pdf
    • https://static.usrfiles.com/ugd/82e28d_4052cc70e6c847b385e037dfabd8ae74.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d3b184bea27474bb7197d5c0a753128.pdf
    • https://static.usrfiles.com/ugd/e745be_fab12b9b2b764a5fa3f33ecbb8208104.pdf
    • https://cdn.shopify.com/s/files/1/0432/1781/3661/files/pekenekujutabu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/pefamalukeba.pdf
    • https://cdn.shopify.com/s/files/1/0435/4274/1143/files/fundamentals_of_business_process_outsourcing_102.pdf
    • https://cdn.shopify.com/s/files/1/0441/1057/7816/files/apa_citation_format_online_website.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3929/files/kimedijajezuvo.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_off000085f8.bin
98fa1a7e7941ef76bc87f5eadcd732363a1a13dff9ce5f05a4339962cf9c840d
pdf-font-stream PDF embedded font (sfnt) at offset 0x85F8 5632 bytes
font_01_sfnt_off000098e8.bin
5fd3b45ba4196194f10a792ec6e39f35b6ae0ac13b296b47eb47117555fd3b97
pdf-font-stream PDF embedded font (sfnt) at offset 0x98E8 10416 bytes