Malicious PDF — malware analysis report

Static analysis result for SHA-256 32da4c0a88227823…

MALICIOUS

PDF

50.4 KB Created: 2020-08-09 22:13:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ad29b3c0134db7dd92a87a10c05253f SHA-1: cd1774432b723a67682a6fd033ebacd39f0ac6b7 SHA-256: 32da4c0a88227823c089bb574d55293dfc6ad674ef3f2c0ebdd946976bde24d7
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to a 'pet sample answer sheet pdf' and a URL that appears to be the primary malicious redirector. The presence of numerous Shopify links suggests an attempt at SEO poisoning to drive traffic to malicious sites.

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=pet+sample+answer+sheet+pdf
    • http://files.chippenhampositiveliving.com/uploads/1/3/1/4/131438157/9653246.pdf
    • http://files.coachellavalleyinjurylaw.com/uploads/1/3/2/6/132696351/tigex_vetugusep_xadugesex_majera.pdf
    • http://files.madeintheglades.com/uploads/1/3/2/8/132815004/9786959.pdf
    • https://cdn.shopify.com/s/files/1/0432/6889/8966/files/moviebox_ios_9._0._2.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2465/files/austenitic_stainless_steels_microstructure_and_mechanical_properties.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/duzoliwanule.pdf
    • https://cdn.shopify.com/s/files/1/0436/4537/0521/files/25888842461.pdf
    • https://cdn.shopify.com/s/files/1/0432/6821/0852/files/attorneys_fidelity_fund.pdf
    • https://cdn.shopify.com/s/files/1/0429/1896/9507/files/kawebewukuzifufujore.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/nubulesesirebilus.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/pavida.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4708/files/maintenance_page_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/9272/9246/files/15778170192.pdf
    • https://cdn.shopify.com/s/files/1/0435/1649/3976/files/32744591119.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_off00006961.bin
c79112f62126c8001865418394e3749ee7798f0e04ff3f555372eee6ee6c14bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6961 5376 bytes
font_01_sfnt_off00007b8b.bin
e60452f02781b11b49b6ce7a7597a26cf1e9605f9f2eeea466274566ab89c533		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B8B 13240 bytes
font_02_sfnt_off0000a5ed.bin
da133098c8ec00180ce5fe37c74b807b143adc5860869a2f7b6211e455203b10		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5ED 16112 bytes

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