Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c80260a41fdf9d6…

MALICIOUS

PDF

38.6 KB Created: 2020-08-10 05:28:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f211f44c259ce5eebb366da967ca077 SHA-1: 23615fcd44ee494332ec96be8c181a2d0ec764b8 SHA-256: 1c80260a41fdf9d6e9ad8b626f142913ada6313e2932ed79b96ac84bf088d296
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing indicating it's a malicious redirector. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=nace+cathodic+protection+handbook+pdf'. The document body, though heavily obfuscated, contains references to technical documents and the malicious URL, suggesting a lure to disguise malicious intent. The presence of a link farm further supports the malicious nature of the document.

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=nace+cathodic+protection+handbook+pdf
    • http://files.oursaviorsdevilslake.org/uploads/1/3/1/1/131163533/5105704.pdf
    • http://lonum.oicphotography.com/uploads/1/3/1/4/131453133/dozalitopaba.pdf
    • http://files.rcdavis-tellinstories.com/uploads/1/3/1/3/131383624/ebc2656e5828c5.pdf
    • https://cdn.shopify.com/s/files/1/0438/6933/9808/files/coordinate_plane_blank.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4164/files/89367360954.pdf
    • https://cdn.shopify.com/s/files/1/0436/1188/1634/files/evento_cerebrovascular_isquemico_y_hemorragico.pdf
    • https://cdn.shopify.com/s/files/1/0434/0862/1719/files/62312809857.pdf
    • https://cdn.shopify.com/s/files/1/0432/2872/5405/files/xeveviromuzeparawemi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3093/6733/files/pejatawo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7660/files/cursive_writing_capital_and_small_letters.pdf
    • https://cdn.shopify.com/s/files/1/0431/6063/3504/files/69836686857.pdf
    • https://cdn.shopify.com/s/files/1/0436/9596/4328/files/31241337573.pdf
    • https://cdn.shopify.com/s/files/1/0431/0938/4343/files/ingo_accountability_charter.pdf
    • https://cdn.shopify.com/s/files/1/0438/6563/7019/files/45274715379.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_off000058f9.bin
65624defbea179e89963693ab2c2eea70fd2ec930ee53da7aad326cbd28447ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58F9 5204 bytes
font_01_sfnt_off00006aaa.bin
dec1fb99d4eb4280b6638c5f3c69953eb5a800a0a5b4258e4db620535fbb4daa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAA 10148 bytes

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