Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8c9f02cc1a72bdf…

MALICIOUS

PDF

67.0 KB Created: 2020-08-24 02:22:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4306a1ba2ec6940ce670d62de0ef82f0 SHA-1: 1d70dab475a4385e22f607b1a009fd25aaecd503 SHA-256: a8c9f02cc1a72bdf7c64e80a22b8e9f922c9581ee05878f0abf146ec2612f3e2
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to programming and the redirector URL also contains a programming-related keyword, suggesting a lure. The heuristic firings confirm the presence of malicious redirector links and a link farm 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=foreach+loop+in+laravel+blade+template
    • http://files.detourtowonderland.com/uploads/1/3/1/3/131381675/pikixebikosalop.pdf
    • http://files.hivhope.net/uploads/1/3/1/4/131453406/834b0d1a77ae.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5796/files/99228155293.pdf
    • https://cdn.shopify.com/s/files/1/0431/7056/2209/files/64930725323.pdf
    • https://cdn.shopify.com/s/files/1/0434/0118/3388/files/instrument_cable_selection_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/8720/7327/files/nutopatorok.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/75653682116.pdf
    • https://cdn.shopify.com/s/files/1/0428/9665/4499/files/70431945717.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/6003/files/the_way_i_am_eminem_biography.pdf
    • https://cdn.shopify.com/s/files/1/0432/2512/0927/files/supply_chain_management_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4521/5656/files/94660834275.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5435/files/ways_to_prove_triangles_congruent_answer_key.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_off0000b60d.bin
2c297cac7f721cfdb64dc1a88a9c5c6911f95da7113d872c92488b62a72b3fbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB60D 5292 bytes
font_01_sfnt_off0000c7e1.bin
a8be9b504070d5e95b563e3f117953a107318814f249eaaf7d32cb3818895c8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E1 17068 bytes

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