Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d4cc30b2ce503ac…

MALICIOUS

PDF

45.1 KB Created: 2020-08-14 11:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e955da44cffef4f902f4abe1d71a3e4 SHA-1: 4c027f76d3cd071d490237f794e6655937a61d61 SHA-256: 1d4cc30b2ce503ac5b85aa86d1088247c92b41f8159bd575fbc2f4c12c6db4e0
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=moments+class+9+extra+questions+and+answers'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to a malicious site. The presence of numerous Shopify-hosted PDF links further indicates a link farm or SEO poisoning attempt to distribute malicious content.

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=moments+class+9+extra+questions+and+answers
    • http://files.drtonicamacho.com/uploads/1/3/2/6/132681556/9044168.pdf
    • http://files.theclinicnextdoor.com/uploads/1/3/1/3/131398419/4077ddca5.pdf
    • http://files.ancientvoodoorituals.com/uploads/1/3/2/8/132814933/a1f29940819.pdf
    • http://files.texascedarblinds.com/uploads/1/3/2/3/132303082/nusoxosaforegom_juxebabapatuni_mawirakivakixez_kaxixejowibar.pdf
    • http://files.artwithmrswood.com/uploads/1/3/0/7/130775725/b8fc4.pdf
    • https://cdn.shopify.com/s/files/1/0437/1991/7720/files/12602698141.pdf
    • https://cdn.shopify.com/s/files/1/0440/0916/0862/files/37473547711.pdf
    • https://cdn.shopify.com/s/files/1/0433/5098/2821/files/53014780287.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/dukuligu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3011/7526/files/chemistry_periodic_table_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/host_file_windows.pdf
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/49689920154.pdf
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/38076931891.pdf
    • https://cdn.shopify.com/s/files/1/0437/0225/5770/files/65014459732.pdf
    • https://cdn.shopify.com/s/files/1/0430/3483/7149/files/72073820803.pdf
    • https://cdn.shopify.com/s/files/1/0433/0933/4696/files/81987698498.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_off000072b1.bin
9450733d0f393005a4fdd83e6e145afb1645f33e1a49c7b7dd1d94e6f7c5908c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72B1 5532 bytes
font_01_sfnt_off0000857c.bin
5a2e8aa3b610877aaf2cea79894083be5979fb8e9e0af14e6d9a93a00ad5527e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x857C 10036 bytes

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