Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dc4b3d6a5ff09f5…

MALICIOUS

PDF

43.8 KB Created: 2020-08-17 08:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7aa625a33fd013dfc9e044c0d0e73c7e SHA-1: 3fdc05dab14aa7a4850a113929eb880663d4ba66 SHA-256: 9dc4b3d6a5ff09f5b1965b446f10a9e5d95578dd4183864c2938fc5b46f35821
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=cadbury+silk+ad+video'. The document body, though heavily obfuscated, contains references to this URL and other URLs hosted on Shopify and other domains, suggesting a link farm or redirection scheme. The primary attack pattern involves luring users to a malicious site via a deceptive link within the PDF.

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/pify?keyword=cadbury+silk+ad+video
    • http://files.museautoproject.com/uploads/1/3/1/8/131858661/gajizopogadinuvaxug.pdf
    • http://files.bouncehopper.com/uploads/1/3/2/7/132740253/menak-bewirerige-fosizimukivimo-gagazopo.pdf
    • http://biraput.sealsriflescopes.com/uploads/1/3/0/9/130969352/a54a97.pdf
    • https://cdn.shopify.com/s/files/1/0432/0090/5380/files/85377160680.pdf
    • https://cdn.shopify.com/s/files/1/0432/8466/0380/files/wemidogunuseminomisex.pdf
    • https://cdn.shopify.com/s/files/1/0434/3051/0758/files/ielts_writing_task_1_sample_answer_band_7.pdf
    • https://cdn.shopify.com/s/files/1/0429/3305/9737/files/engineering_economics_analysis_12th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7262/files/82683603989.pdf
    • https://cdn.shopify.com/s/files/1/0432/4062/0200/files/76355935327.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.pdf
    • https://cdn.shopify.com/s/files/1/0429/2381/9164/files/hyperbole_and_a_half_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/3305/9737/files/noxodoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2708/files/67555043654.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_off00006da6.bin
4c1013f19d8ee6b2aadaf07f89c0e3ad16f9e83f3a5a54b44d6459dcd86add90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA6 5092 bytes
font_01_sfnt_off00007f0d.bin
0563193c60202f7bebaee0e34b3db0feb4e299a391c7f60aeb29445a094d78e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F0D 10356 bytes

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