Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdbaad069bef4c6b…

MALICIOUS

PDF

45.6 KB Created: 2020-08-24 17:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a08e6682aa3e5927cccf1dd89af93c18 SHA-1: 3fd42bafc17da6b5a1c9f463aa3c13216db1d8f3 SHA-256: fdbaad069bef4c6bd27bc76955cd37b857f19b8b6d1a7f94b1326d88ae62930a
150 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 'ttraff.ru'. This URL is presented within the document body, disguised as a 'Dungeon defenders farming guide'. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The primary malicious URL is the redirector, which likely leads to a further stage of infection.

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/pify?keyword=dungeon+defenders+farming+guide
    • http://files.indusvastra.com/uploads/1/3/2/7/132740285/8482791.pdf
    • http://files.cuastt.com/uploads/1/3/1/3/131398591/9247193.pdf
    • http://files.agcvfra.net/uploads/1/3/1/1/131164387/penav-gagino-gixojarag-banurofiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0626/files/xuwoxomizafeje.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7913/files/kilapo.pdf
    • https://cdn.shopify.com/s/files/1/0454/2621/3032/files/chemistry_notes_form_3.pdf
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/xupumojokepejiliviruxufit.pdf
    • https://cdn.shopify.com/s/files/1/0428/0903/2863/files/caller_id_block_calls_texts_apk.pdf
    • https://cdn.shopify.com/s/files/1/0429/2768/5798/files/3194778907.pdf
    • https://cdn.shopify.com/s/files/1/0431/6515/5489/files/dolurifakekiforapotamux.pdf
    • https://cdn.shopify.com/s/files/1/0437/8879/6065/files/83647764548.pdf
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/nemasiwo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4292/0869/files/tuberculous_pleural_effusion.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_off00007547.bin
efe8f9d2eea4b195361c4eda1124e5cdd874e79d1cda3790f5cef7a0ac59c7fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7547 5192 bytes
font_01_sfnt_off000086e1.bin
9322257c6b85a9b976513368fd0ed47e827427ff291ce341111fe62ee2c970dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86E1 10192 bytes

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