Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22334f015d2e6a5…

MALICIOUS

PDF

37.3 KB Created: 2020-08-31 14:22:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0720dd093d1834fddcdc2d49840c469b SHA-1: 1831ba6623612c135b6add7d1eafae37de784edc SHA-256: b22334f015d2e6a5b11cc999acdcf94225adfb790288d2b9059296c5dab2c60d
150 Risk Score

Malware Insights

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

The PDF file contains a link to a redirector URL, which is a common tactic for delivering malicious payloads or phishing pages. The document body text, though partially corrupted, includes the phrase 'd. h. u ka full form' and the redirector URL, suggesting a lure to entice users to click the link. The presence of numerous other PDF links, many hosted on cdn.shopify.com, indicates a potential link farm or SEO poisoning attempt to increase visibility. No scripts were extracted from this sample.

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/wix?keyword=d.+h.+u+ka+full+form
    • https://cdn.shopify.com/s/files/1/0440/4586/1029/files/wemixiremofejosenit.pdf
    • https://cdn.shopify.com/s/files/1/0435/3936/6047/files/lajazivuja.pdf
    • https://cdn.shopify.com/s/files/1/0438/3028/0352/files/nabob.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/brunswick_county_gis.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe4d156699cb4103ae10e8fb5e5bc39a.pdf
    • https://static.usrfiles.com/ugd/55cc32_27b4824890474d3fafdbac93ad16f7ff.pdf
    • https://static.usrfiles.com/ugd/6f53d7_d08d8a749e01446694c82a9e700a9b5d.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b67de8ac186408984b0f9405165d63d.pdf
    • https://static.usrfiles.com/ugd/a6e5e9_bd68116339324073b87320f36ee4e5c0.pdf
    • https://static.usrfiles.com/ugd/4d400c_fd55ba4e237e44f0bd74c54e61525493.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6b1f197b51947cfb8d0d19ce9cda23c.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/letter_tracing_worksheets_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/7704/9247/files/danoguwiwove.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/resident_evil_4_gamecube_iso.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/gitokikigudezopolemak.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_off000056c5.bin
ad93baa0f1e8aa171e69098ec17aef4d8f755430aa450f57fe0d88fa2ad12cc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56C5 4924 bytes
font_01_sfnt_off00006768.bin
49f89a1ad416473236b3cc8acd6880fdefbf0994e4e404ba50376595145fb103		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6768 10124 bytes

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