Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a654353f3586cbb…

MALICIOUS

PDF

47.4 KB Created: 2020-08-29 21:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f7913f1c2940601276eb84bd545c793 SHA-1: 3cd46a2c39f7312b93efa1bba4f53839b627fbdb SHA-256: 8a654353f3586cbbb42e40d6cb9a449a6294e5ea755117f780a4429378ee33a6
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The document body contains obfuscated text and URLs, including the malicious redirector URL and a link to a PDF hosted on static.usrfiles.com, which is part of a link farm. No scripts were extracted, but the presence of a malicious redirector and link farm indicates a phishing or social engineering attempt.

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=ubicaci%25C3%25B3n+de+termostato+encima+2004
    • https://static.usrfiles.com/ugd/b8c837_bb9c164d9f764af6adca72799d9bd272.pdf
    • https://static.usrfiles.com/ugd/b8c837_3a63028323c847d08fe0f16678de305c.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_525f2d8be17b4edd981a357cf0d8a88c.pdf
    • https://static.usrfiles.com/ugd/b8c837_32af411ec13b4b5586ca4b5e2a8b5380.pdf
    • https://static.usrfiles.com/ugd/4b7290_58d0a341dacb44de97c3ef98401a6e4c.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_05dd983c01104df1bfb59037772e7610.pdf
    • https://static.usrfiles.com/ugd/16a96a_204f9f71f5af486da3d527814f29b40e.pdf
    • https://static.usrfiles.com/ugd/822ecd_df0613a258b143368bc8fb5ec2e86cac.pdf
    • https://cdn.shopify.com/s/files/1/0438/6573/5328/files/lebajizitulawinima.pdf
    • https://cdn.shopify.com/s/files/1/0430/9807/9399/files/mifaxunonokuruben.pdf
    • https://static.usrfiles.com/ugd/b8c837_d0614adc855f4867a65f5f7e76bb8fdc.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bc2e08d076f4eeaba5a49481af29a07.pdf
    • https://static.usrfiles.com/ugd/b8c837_16b7fe9c1eda4e3a8115e9b9889cfa88.pdf
    • https://static.usrfiles.com/ugd/b8c837_d78f471f79da4167b0a7e9953e87252a.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_off00007696.bin
ae6d481319b886117f3b887418e02444495aa639db6ab8e92c193430aa2f1cc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7696 5680 bytes
font_01_sfnt_off00008992.bin
4c348c3f07fc449c79db60a56c554fe15d608391d6d632cd4ed4eb75c0fb844c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8992 11260 bytes

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