Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2b85814b7273fe…

MALICIOUS

PDF

39.0 KB Created: 2020-08-15 23:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b301a0d5afb7dff2bdf71a2b6437eb1 SHA-1: 9695e0698a6abcc0f50c4f8a998ab9fc354a02a4 SHA-256: ab2b85814b7273fe9476ca6230b5cd10ce07348ae31f42d417fbe8810b8e18b1
150 Risk Score

Malware Insights

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

The PDF contains embedded links designed to redirect users to malicious sites. One such link, 'https://ttraff.cc/wb?keyword=industrial%20electrical%20wiring%20seminar%20report%20pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to download further content or visit a malicious site. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm for SEO poisoning or distributing malicious files.

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/wb?keyword=industrial%20electrical%20wiring%20seminar%20report%20pdf
    • http://files.divinaartwork.com/uploads/1/3/1/8/131856624/1995723.pdf
    • https://cdn.shopify.com/s/files/1/0432/9819/3573/files/fijezor.pdf
    • https://cdn.shopify.com/s/files/1/0428/1086/7871/files/27782694080.pdf
    • https://cdn.shopify.com/s/files/1/0430/8441/5143/files/physical_science_concepts_in_action_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0427/5548/9948/files/53466768679.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/jobuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/2520/2325/files/45533099454.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/descargar_libro_escritores_de_la_libertad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29121996303.pdf
    • https://cdn.shopify.com/s/files/1/0438/2890/4093/files/97498207835.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87294954422.pdf
    • https://cdn.shopify.com/s/files/1/0441/4462/3768/files/16408348271.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_off000059e6.bin
57cab457ea9fa6f87480437ea5fe2f1f9e4ad45cf1aa3a2d81a11db5aaab9281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59E6 5504 bytes
font_01_sfnt_off00006c96.bin
a9cf150addcce4c8cc385bba8261b3d4f619af47957a92207cc8caea3d3cb7b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C96 10164 bytes

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