Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f4f5be9e8909100…

MALICIOUS

PDF

47.4 KB Created: 2020-09-03 03:52:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1af62fd3a76bf77dacfb9a8ff03d110b SHA-1: dfb5a7f719a29be12782b91f9174ac7a846f4358 SHA-256: 2f4f5be9e89091002437af8f3c2a7265ea11567ace8798538ae32f52404337f8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=antivirus+for+windows+7+free+trial'. This URL is embedded within the document body, suggesting a lure to download or visit a malicious site. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning to drive traffic to malicious sites. The ML classifier 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.club/wix?keyword=antivirus+for+windows+7+free+trial
    • https://static.usrfiles.com/ugd/110ef3_79db010d65f84076b86d5c1aacac2465.pdf
    • https://static.usrfiles.com/ugd/98e298_720b414dabb740e69369b7222b7b4617.pdf
    • https://static.usrfiles.com/ugd/8a9bcc_e4f5b115b08844b7ba739fd7248cc81c.pdf
    • https://static.usrfiles.com/ugd/3f0e57_9be88b21eff34aed8645944bf5a3aa69.pdf
    • https://cdn.shopify.com/s/files/1/0433/8139/1514/files/informe_de_mecanica_de_suelos_calicata.pdf
    • https://cdn.shopify.com/s/files/1/0435/4595/2408/files/bilingualism_vs_multilingualism.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zosakasebiribo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/49289564837.pdf
    • https://cdn.shopify.com/s/files/1/0434/0128/1703/files/yamla_pagla_deewana_full_movie_123mkv.pdf
    • https://static.usrfiles.com/ugd/23e9be_96e10559f21b4f18bff8fdd3d0634d2e.pdf
    • https://static.usrfiles.com/ugd/3aca14_1109b304b82c45cf86aa7c76fbff8fb8.pdf
    • https://static.usrfiles.com/ugd/e02969_f743fa7a9935410281db142c4086a009.pdf
    • https://static.usrfiles.com/ugd/9421c8_08bf8edc63684938908822012ca27ea6.pdf
    • https://static.usrfiles.com/ugd/c8a981_43c0e567df9b4eb6bd9435cb456d888d.pdf
    • https://static.usrfiles.com/ugd/defcb2_85f53eaaac334fc2880d55780e5f17a6.pdf
    • https://static.usrfiles.com/ugd/ced2dc_57fec8e36cde486f830e8dc3b092b30a.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_132e6d88f14b4692a7b0f7a5e0d1a83f.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007aa4.bin
f422fa0cf198b59a072dd42724a7a7daec3cea549735b2dd61e3a84cbc390b58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA4 5120 bytes
font_01_sfnt_off00008c3b.bin
42d9db9d08e4142079f74fb414a7b0a8931a38c6ad2f664a8255733747156753		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C3B 10704 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.