Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf146cfd516e2493…

MALICIOUS

PDF

40.5 KB Created: 2020-08-29 04:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a68ac0dd2d367351cbfc0662f091ddc9 SHA-1: 85a604d929662f489ea65fa7352941bf945cb820 SHA-256: cf146cfd516e24932c0c0d2fff9c77da1b90aad8493ce3dee1fb58eedfb50292
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector URL associated with malicious activity. The ML classifier also flagged this PDF with high confidence. The primary attack vector appears to be directing users to malicious infrastructure through a link farm, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=actions+vs+non+action+or+stative+verbs
    • https://static.usrfiles.com/ugd/b8c837_9fb24b56143f48fe9235d6d03ba7d6b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_00fb4376e5414629938bd228697599e9.pdf
    • https://static.usrfiles.com/ugd/b8c837_05246396908f44b8971119f04f5d048c.pdf
    • https://static.usrfiles.com/ugd/b8c837_0afb0f52b8904898960e2504f864322e.pdf
    • https://static.usrfiles.com/ugd/b8c837_b128c3a141f74a0eb75a7d75772ce05b.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea269253c2b649f3b3d778e6f3eb3586.pdf
    • https://static.usrfiles.com/ugd/b8c837_a7543a49c0ef427ab294ad4b80b9a20b.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ff12a58e9734f07bc99f9a3f9b7be75.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78491346320.pdf
    • https://cdn.shopify.com/s/files/1/0465/4576/4510/files/new_lipid_lowering_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0431/8222/7617/files/63559579939.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_off000061d8.bin
3a412ae2f037cdf9634e4f560beb3db505e01db93e64e4c4da8f95e7a26223f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D8 4952 bytes
font_01_sfnt_off000072b8.bin
6942ff37d6d34f91c4e2e995f89a443e3186752fbf84ba8caaf0df25c24fee15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72B8 10240 bytes

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