Malicious PDF — malware analysis report

Static analysis result for SHA-256 c343a9c593ff7c49…

MALICIOUS

PDF

58.0 KB Created: 2020-08-18 20:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5db00e86bf9b340ff8037956656984c SHA-1: e4be488bef83af77bc0b25b4954ded4b6debe73e SHA-256: c343a9c593ff7c490135d01079980240849df5ca53335069c73029108d59254c
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'employee recognition award templates free' and the malicious URL. This suggests a phishing attempt to lure users to a malicious site under the guise of providing templates.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=employee+recognition+award+templates+free
    • http://files.wedaughtersoftheking.com/uploads/1/3/1/6/131606289/5108529.pdf
    • http://lanosom.modernflowerchild.com/uploads/1/3/0/7/130775169/f7d3b36798267ce.pdf
    • http://dinexi.airbenme.com/uploads/1/3/0/7/130775048/7856754.pdf
    • http://files.tomdeprisco.com/uploads/1/3/0/7/130739524/9912399.pdf
    • https://cdn.shopify.com/s/files/1/0432/1778/0896/files/54053984310.pdf
    • https://cdn.shopify.com/s/files/1/0431/0653/3527/files/jevazukukusarusut.pdf
    • https://cdn.shopify.com/s/files/1/0433/5032/7451/files/67141620790.pdf
    • https://cdn.shopify.com/s/files/1/0434/8405/3669/files/b._ed_cet_result_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/8106/4853/files/guwovip.pdf
    • https://cdn.shopify.com/s/files/1/0428/9930/8700/files/agonistas_colinrgicos.pdf
    • https://cdn.shopify.com/s/files/1/0431/7108/6485/files/97971119847.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/releninibijexotulajutavur.pdf
    • https://cdn.shopify.com/s/files/1/0437/7729/4498/files/morubofifimepejab.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_off0000a49e.bin
ad5652d328ca706c28c9d6a787c0e225de5590e35bd7de6f6d0ae55156fabb07		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA49E 5628 bytes
font_01_sfnt_off0000b7bf.bin
d6c2610323d9908855e8d947410ea6c90f9b5856205b2c509e0229a429839ec7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7BF 10416 bytes

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