Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bc1786548d574de…

MALICIOUS

PDF

47.9 KB Created: 2020-08-21 06:18:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cabe254d87e3a0d3358ea36b104a65a3 SHA-1: 1c6560ffd4ff45c508047f86e7e8de1da2c1a4f7 SHA-256: 8bc1786548d574de187b4469ebabb951975519ef65fd418871dae2613edb81db
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Ethical decision making matrix template' and includes the malicious URL, suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious redirector. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/pify?keyword=ethical+decision+making+matrix+template
    • http://felivozi.shonkalay.com/uploads/1/3/1/4/131411688/3e71d597cd084.pdf
    • http://gidemuf.robincowan-daniel.com/uploads/1/3/1/8/131856369/584ba2afac.pdf
    • http://files.ipimages.com/uploads/1/3/0/7/130740524/bubagetududegelan.pdf
    • http://rudote.lancasterpressurewashing.com/uploads/1/3/1/1/131163635/923dc5cc92f3.pdf
    • https://cdn.shopify.com/s/files/1/0436/2502/1603/files/this_is_where_i_leave_you_netflix.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6469/files/48490525910.pdf
    • https://cdn.shopify.com/s/files/1/0440/7944/8216/files/31759904115.pdf
    • https://cdn.shopify.com/s/files/1/0433/9082/8700/files/95683098424.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56802730071.pdf
    • https://cdn.shopify.com/s/files/1/0434/7982/6582/files/trapezium_parallelogram_area_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/1525/5710/files/antivirus_avast_full_version_crack.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86662201832.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5614/files/85719693360.pdf
    • https://cdn.shopify.com/s/files/1/0440/4133/9045/files/34748438455.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0810/files/coursera_r_programming_assignment_1.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/applied_nonsingular_astrodynamics.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f8c.bin
1dc1f8697ad9f7c6623f6cb6f82dd4bd5c8ff60b14b670b988fe75648a35ff58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8C 5364 bytes
font_01_sfnt_off00008190.bin
9b0c83204c332d82c1d5a08d5a6219fbca3fff84f670f0edbc3c3d1c4777c8ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8190 10012 bytes
font_02_sfnt_off0000a3d5.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3D5 4324 bytes

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