Malicious PDF — malware analysis report

Static analysis result for SHA-256 34b998ef3f79e52f…

MALICIOUS

PDF

70.7 KB Created: 2020-08-06 03:18:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94f65e5bcb6102605e57ae997ae726d4 SHA-1: e707862199f46cbcdf413add3c2f1c840695aa87 SHA-256: 34b998ef3f79e52fbf2354273ceec8118be7ffaf561298416ade2f490dacfbba
120 Risk Score

Malware Insights

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

The PDF file was flagged for containing a large number of external links, indicating a potential link farm or SEO manipulation tactic. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=blog+de+libros+romanticos+adultos+pdf+gratis', is identified as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect users to potentially harmful 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=blog+de+libros+romanticos+adultos+pdf+gratis
    • http://files.urepabroad.com/uploads/1/3/1/4/131437503/vuxozugefimak-vedarunosa.pdf
    • http://files.mungerink.com/uploads/1/3/1/0/131070918/37afc82d3233.pdf
    • http://files.panisangelicuspress.com/uploads/1/3/1/3/131384018/7094245.pdf
    • https://cdn.shopify.com/s/files/1/0430/7582/9911/files/pleasure_p_boyfriend_2.pdf
    • https://cdn.shopify.com/s/files/1/0437/1962/2808/files/82164241750.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7616/files/manititag.pdf
    • https://cdn.shopify.com/s/files/1/0429/4138/2812/files/wenifusa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7679/6057/files/lipakubilatewebejaboxizi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2581/files/89216425212.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/13316238986.pdf
    • https://cdn.shopify.com/s/files/1/0439/3933/2251/files/deselupubolis.pdf
    • https://cdn.shopify.com/s/files/1/0431/6086/2874/files/jorukukajowalu.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_off0000d338.bin
a2cfdd565079a972915e17d1bda390a2d4d0a0cecc82372702e2391c9efa66d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD338 5664 bytes
font_01_sfnt_off0000e663.bin
030ca4ef4239c1fcf9bd16637a428f4986bc9ecb406803432eadc041a1a6efac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE663 11476 bytes

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