Malicious PDF — malware analysis report

Static analysis result for SHA-256 a07f94ef4ba50ded…

MALICIOUS

PDF

40.8 KB Created: 2020-08-20 21:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a49a3af40f9988a021a4d532369f1581 SHA-1: 4aedb70ae99570dfa65ee9e2fca66ac35f1fbbb9 SHA-256: a07f94ef4ba50dedf8e0fcdd8e7d2aede174e453a57246815939455841ea3890
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The embedded URL 'https://ttraff.ru/pify?keyword=amatic+sc+font++mac' is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and numerous other links pointing to Shopify and other domains, suggesting a large-scale effort to distribute malicious content. No scripts were extracted from this sample.

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=amatic+sc+font++mac
    • http://files.mrtempeh.com.au/uploads/1/3/1/4/131454355/wimanisulaselit_buzis_tiwenejiga_venoko.pdf
    • http://files.petesenoffphotographics.com/uploads/1/3/2/6/132681596/2205510.pdf
    • http://vekobe.intimatelyyoursweddings.com/uploads/1/3/0/7/130775244/5331896e6.pdf
    • https://cdn.shopify.com/s/files/1/0435/0610/6528/files/92401794968.pdf
    • https://cdn.shopify.com/s/files/1/0431/5342/4540/files/buzenugorutam.pdf
    • https://cdn.shopify.com/s/files/1/0431/8350/5570/files/47006937166.pdf
    • https://cdn.shopify.com/s/files/1/0432/9173/8277/files/72815625413.pdf
    • https://cdn.shopify.com/s/files/1/0433/1657/6424/files/roduribofejupekupuvifu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0880/2468/files/74160135185.pdf
    • https://cdn.shopify.com/s/files/1/0431/6623/6834/files/apostila_auditoria_fiscal.pdf
    • https://cdn.shopify.com/s/files/1/0436/9360/5014/files/mathematical_physics_by_hk_das.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/gekopalozasag.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/3446722220.pdf
    • https://cdn.shopify.com/s/files/1/0432/7574/7483/files/11583008824.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_off000058f3.bin
c78372562bcc0488d31cd438f275a898e171bab7712b79f0ec47b82665020404		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58F3 4888 bytes
font_01_sfnt_off0000697b.bin
115c9011b1cde5382de84860d94a28dc84fa2e4153a2ab3a18cb7dc0a2e5d629		 pdf-font-stream PDF embedded font (sfnt) at offset 0x697B 14132 bytes

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