Malicious PDF — malware analysis report

Static analysis result for SHA-256 887b93ce18ab30fb…

MALICIOUS

PDF

44.7 KB Created: 2020-08-11 23:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a907c0f8ab1f8b91e967e62dd323a2c5 SHA-1: fc7f23cd86ae27bc54472da0416b461126b25604 SHA-256: 887b93ce18ab30fb2f4acd9e0f6c2e707084340e34fd7e91ec9c1146e0949346
150 Risk Score

Malware Insights

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

The PDF contains a prominent link disguised as a utility for converting PDF to Word, which is a common lure. This link points to a known malicious redirector infrastructure. The document also features a large number of embedded links, many hosted on cdn.shopify.com, suggesting a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted from this sample.

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/pify?keyword=convert+pdf+to+word+on+mac+using+preview
    • http://files.taffycorbettdesign.com/uploads/1/3/1/4/131406049/nuzawujelodamewexini.pdf
    • http://files.shop22.shop/uploads/1/3/1/1/131164479/6836054.pdf
    • http://files.michellemcdanielportfolio.com/uploads/1/3/1/4/131407901/ea8788279f.pdf
    • http://files.philipcleaning.com/uploads/1/3/1/4/131453401/8b5fa0ce924c.pdf
    • http://files.shellygiggey.com/uploads/1/3/0/7/130776592/9045740.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/boxepaselu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0485/3406/files/wikazebudumotupo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/biomedical_model_of_health_strengths_and_weaknesses.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sutapazuvonovojikujabera.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/84520790137.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16494210232.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/83583068491.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5510/files/ascii_code_format.pdf
    • https://cdn.shopify.com/s/files/1/0432/1673/2320/files/37002527651.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pobilimej.pdf
    • https://cdn.shopify.com/s/files/1/0432/2741/4696/files/warlock_pre_bis.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_off00006fad.bin
e217803968564ce53bb1a31b77a9cd1b7c2193370c1a11db6bd0c3000eadb200		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAD 5500 bytes
font_01_sfnt_off00008265.bin
7b3fffbba64280851c3e46143bc0dd93ae7a01a5f8e9c9a12c1ba74c2339d54d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8265 10364 bytes

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