Malicious PDF — malware analysis report

Static analysis result for SHA-256 9427cd83b3680581…

MALICIOUS

PDF

41.1 KB Created: 2020-08-08 14:56:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4293e0255da5aa5fcc483ac0f944b943 SHA-1: 08129b25879b82bbc829152a00c62fc3f420f32b SHA-256: 9427cd83b3680581201303296c94c07f06c090dcf1eee1fe2180936e5f7f7e86
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains the primary URL which leads to a redirector. This suggests a phishing or scam attempt designed to lead users to malicious content.

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=compuestos+inorganicos+ejemplos+pdf
    • http://files.worthingexcelsior.co.uk/uploads/1/3/2/3/132303270/2818932.pdf
    • http://files.profecpaintersllc.com/uploads/1/3/1/6/131606175/fizev.pdf
    • http://files.thomasnazario.com/uploads/1/3/1/4/131438175/9331884.pdf
    • https://cdn.shopify.com/s/files/1/0439/9231/8110/files/99826655044.pdf
    • https://cdn.shopify.com/s/files/1/0437/6448/2202/files/34329624859.pdf
    • https://cdn.shopify.com/s/files/1/0429/5137/7049/files/9506968054.pdf
    • https://cdn.shopify.com/s/files/1/0446/2844/3299/files/tf_idf_java.pdf
    • https://cdn.shopify.com/s/files/1/0437/1755/8426/files/41775615958.pdf
    • https://cdn.shopify.com/s/files/1/0434/6347/5352/files/nomunukavuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/6968/6431/files/jumag.pdf
    • https://cdn.shopify.com/s/files/1/0429/6117/4684/files/55883199656.pdf
    • https://cdn.shopify.com/s/files/1/0439/2511/0952/files/pdf_voice_reader_for_iphone.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_off00005f76.bin
7222c5bcc4a5a0d39edd3d8305a2127f66441ca172e03d5ecfe921b505c32d81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F76 5456 bytes
font_01_sfnt_off000071ed.bin
2febc22f9ad4a99c18172ea348bd14168b12976f913015964addaf6a21562766		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71ED 11280 bytes

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