Malicious PDF — malware analysis report

Static analysis result for SHA-256 086f8941225fdcde…

MALICIOUS

PDF

124.6 KB Created: 2020-08-07 07:27:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 542767583d0395812790c55af80be328 SHA-1: adf7409d75c391048434e2ca05b092cccdb89200 SHA-256: 086f8941225fdcde35432e4c5879d4855cb569d800bc494a92c1c164a01dbfc1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the document is designed to trick users into visiting malicious websites, likely for an advance-fee scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=beauty+and+the+beast+pdf
    • http://noluw.the4groupuk.com/uploads/1/3/0/8/130873826/gibeted.pdf
    • http://files.costaricaherbalmedicine.com/uploads/1/3/1/4/131437477/6c8f4678f1902ef.pdf
    • http://files.watersportsinkorea.com/uploads/1/3/0/7/130776167/db9509707c7.pdf
    • http://files.educatedlittlemonsters.org/uploads/1/3/0/9/130969576/9149473.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/nivorebuvuxajazu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/18531552521.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4917/files/lupebipikejejudejaxidol.pdf
    • https://cdn.shopify.com/s/files/1/0431/3723/7146/files/24571909461.pdf
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/68554488705.pdf
    • https://cdn.shopify.com/s/files/1/0439/5529/0270/files/nuxumibev.pdf
    • https://cdn.shopify.com/s/files/1/0440/2737/9877/files/jigegaboxip.pdf
    • https://cdn.shopify.com/s/files/1/0435/7668/8798/files/37321431831.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/28631863473.pdf
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/puvatu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0596/8537/files/basic_chemistry_timberlake_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0445/4455/7220/files/pruebas_bioquimicas_para_e_coli.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018b98.bin
f88ef9071f296d7fa46785b9e50c4945162c2c9294caa450d3659fac8bd52703		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18B98 5292 bytes
font_01_sfnt_off00019d95.bin
c7c78022bc4a14f2c78c13a38e6b91054a96ba1dcab3d768b6b97e8534d264fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19D95 2320 bytes
font_02_sfnt_off0001a806.bin
dc6eaa8c7d911c1e8d93c0e86ecf6641a4db92399686417511db9150db10bf9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A806 11148 bytes
font_03_sfnt_off0001ce57.bin
489ce8f452182e0d24a5e0c53468b43ba89d15a05a2be8a460b47897ed0032e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE57 16304 bytes

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