Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eb4852b70b2d897…

MALICIOUS

PDF

60.8 KB Created: 2020-08-31 06:01:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fcfd6935d8f1ac0e841c5af56d11b41 SHA-1: 95b6829fc63a960871dc292d55662a67ef8227d6 SHA-256: 4eb4852b70b2d8976f22fe99334745a081271975b214c95b3d6c37556c4e397d
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 'https://ttraff.cc/wix?keyword=grupo+de+whatsapp+cp+mexico'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, suggesting a lure to external content.

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.cc/wix?keyword=grupo+de+whatsapp+cp+mexico
    • https://cdn.shopify.com/s/files/1/0430/3742/5818/files/4262959817.pdf
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/xovobakabegazulanudo.pdf
    • https://cdn.shopify.com/s/files/1/0440/1253/5958/files/mokaxureratizixomin.pdf
    • https://cdn.shopify.com/s/files/1/0440/6745/5128/files/skyrim_special_edition_guide_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/2529/9613/files/moguvifatipijonegiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zipepatijexozuzazes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sakemiribukewud.pdf
    • https://cdn.shopify.com/s/files/1/0448/0493/1746/files/xeropetevutex.pdf
    • https://cdn.shopify.com/s/files/1/0432/5048/3368/files/diagnosis_banding_anemia_defisiensi_besi.pdf
    • https://cdn.shopify.com/s/files/1/0464/7613/2502/files/40267236970.pdf
    • https://cdn.shopify.com/s/files/1/0431/7488/7590/files/40848991231.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2335/files/rounded_concrete_forms.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a1f3.bin
21e4e74d55e9b4e3097ec95bb5c19ad84f303c0426f621153879fac2412b6707		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1F3 5248 bytes
font_01_sfnt_off0000b3e8.bin
0f9617be5beb062411ab4809b67197bced065a176523ac125ea3965c61d9a67f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E8 10568 bytes
font_02_sfnt_off0000d815.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD815 4324 bytes

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