Malicious PDF — malware analysis report

Static analysis result for SHA-256 549d146e062fe9f5…

MALICIOUS

PDF

40.5 KB Created: 2020-08-21 16:17:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bd2f864d0bfafa2257800579149363c SHA-1: 9100d43b59258e0ea04894c42c40d8ccf1a14069 SHA-256: 549d146e062fe9f50fbfa1b79695bb2ec6f595b1b1f1de5a39c171ea413e5512
120 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, directing users to 'https://ttraff.cc/pify?keyword=child+adoption+form+pdf'. This, combined with a PDF link farm heuristic, indicates a social engineering attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains the same malicious URL and several other URLs hosted on Shopify and other domains, some of which are marked as unknown reputation.

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/pify?keyword=child+adoption+form+pdf
    • http://nupovoro.maskshop.ca/uploads/1/3/2/7/132710797/notegijiw.pdf
    • http://vuvulu.anglemidwest.com/uploads/1/3/0/8/130814397/e59cf7a0.pdf
    • https://cdn.shopify.com/s/files/1/0434/5469/3537/files/3d_photos_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0431/7144/6939/files/98875507239.pdf
    • https://cdn.shopify.com/s/files/1/0430/1750/2869/files/anaesthesia_for_medical_students.pdf
    • https://cdn.shopify.com/s/files/1/0431/2953/6668/files/pawodijosatipa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/jifegamomufev.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tutokufumetuja.pdf
    • https://cdn.shopify.com/s/files/1/0434/6223/0181/files/bacteriologia_microbiologia.pdf
    • https://cdn.shopify.com/s/files/1/0429/7857/4490/files/parezibewoberu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0821/9560/files/input_type_file_accept_image_and.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67257536452.pdf
    • https://cdn.shopify.com/s/files/1/0432/2105/7700/files/biwabixasulupizexododadaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/7120/1699/files/12274707444.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_off00006314.bin
4c397bf2d04ef7253ca7dbe67d11292425afa0051411aa398a04989994ee5d7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6314 5008 bytes
font_01_sfnt_off000073ed.bin
5c1603de70dd02802fa7e2436793f674bd8eb77509ad1d6eec6b58bbf5ab8b72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73ED 9880 bytes

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