Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cbec07f64a55fda…

MALICIOUS

PDF

34.5 KB Created: 2020-08-16 20:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a26fc39254967334b7c92e6db1ba979f SHA-1: 4f41a32e125208a1c5e31ff1f289bd2c1479c0f4 SHA-256: 2cbec07f64a55fda7d10cd146e1f7e992ce76f332bd428b9a74fadb89336ed8c
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The presence of a large link farm suggests an attempt to manipulate search engine results or distribute malicious content through seemingly benign documents.

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.com/pify?keyword=blue+jay+way+sheet+music
    • http://jujet.taylordumasdesign.com/uploads/1/3/2/6/132681409/2d8f89c84805d5b.pdf
    • http://files.portlandharborwatertours.com/uploads/1/3/0/7/130776590/vowosaf_wixikafuj_firurizamiju_bipojigodis.pdf
    • http://fakemam.demornewarrenddub.com/uploads/1/3/2/3/132302978/df8a148f0c.pdf
    • http://samizex.nealybirthandlactation.com/uploads/1/3/2/8/132814930/9211092.pdf
    • http://files.theturfsmurf.co.uk/uploads/1/3/2/8/132814468/womed-kofewikubad-jasabu-wiwolam.pdf
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/seismic_attributes_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0597/files/chalcedonian_creed.pdf
    • https://cdn.shopify.com/s/files/1/0435/1747/7019/files/bitibodi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2708/files/43324104760.pdf
    • https://cdn.shopify.com/s/files/1/0447/7875/0101/files/37833385214.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vitalifurefafimeribedewo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/bisuxodep.pdf
    • https://cdn.shopify.com/s/files/1/0431/3192/8740/files/potential_transformer_testing.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/61587671118.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/wevujoxixiwoluxukolun.pdf
    • https://cdn.shopify.com/s/files/1/0432/2027/1259/files/58923853429.pdf
    • https://cdn.shopify.com/s/files/1/0435/3284/5207/files/55102018192.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_off00004987.bin
dd9660992f114eee1e220ee5144313a9b7026bf70d305efd3396f0f2e497acc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4987 5260 bytes
font_01_sfnt_off00005b64.bin
2025987fb120e8c81c6509953d85dc89ea4c557b17627c5eb459a3ec9823cba7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B64 10112 bytes

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