Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bae37e0fbc54e6d…

MALICIOUS

PDF

37.5 KB Created: 2020-08-30 16:06:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a37164a4c2677534a32659f705234e21 SHA-1: 97130904d3192d5f256e98f5ec38a0bf42819c97 SHA-256: 4bae37e0fbc54e6d57b7ae9ff8cd627150cbc1d83ff50e59ab4f4fdd2225d60c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be luring the user to click the malicious link, which likely initiates a download or redirects to a malicious site.

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.com/wix?keyword=palabras+llanas+esdrujulas+agudas+ej
    • https://cdn.shopify.com/s/files/1/0433/5095/0041/files/66640532904.pdf
    • https://cdn.shopify.com/s/files/1/0433/4111/9653/files/pikojotulasa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1558/files/torejezevuzamu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7668/0870/files/14077611455.pdf
    • https://static.usrfiles.com/ugd/7f16bd_f04535d2d90e45f1b7179b9797590d0a.pdf
    • https://static.usrfiles.com/ugd/89363e_556d8a386b68424b94eab959e4e66ccb.pdf
    • https://static.usrfiles.com/ugd/b8c837_41e7b55853824b1d8aa276587fab3c5e.pdf
    • https://cdn.shopify.com/s/files/1/0433/9017/3333/files/greenhouse_effect_pdf_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/direct_debit_form_template_word.pdf
    • https://cdn.shopify.com/s/files/1/0454/3532/2526/files/10443030472.pdf
    • https://static.usrfiles.com/ugd/cc14e4_41d147d107f64b148b1a26deed0e29c6.pdf
    • https://static.usrfiles.com/ugd/822ecd_dc048a2206d6468eb9cfce72176b79d5.pdf
    • https://static.usrfiles.com/ugd/c618e9_560cc7419589438e973ab9bcf84e6bab.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_off000052e6.bin
47fc02f04baf10f0149c620bf65e7ffe0ec9defa5dabdfa46bbf9305375978de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52E6 5212 bytes
font_01_sfnt_off000064a1.bin
4726ae6bce6fbcf886cee54d79272f343b1641fd2de8976b63bc681b2c09710c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A1 10872 bytes

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