Malicious PDF — malware analysis report

Static analysis result for SHA-256 9270bb8690d9d401…

MALICIOUS

PDF

46.0 KB Created: 2020-08-07 08:19:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bea6729420350be14c34fa7f4478187 SHA-1: 8daa992cf93d5b89f4a40a39ecbdec8765703ff6 SHA-256: 9270bb8690d9d4016570b83aa57d6f1297e7597bb3e3f2335f23b10b20679158
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 domains associated with link farms and redirectors. The primary malicious link identified is 'https://ttraff.cc/pify?keyword=bruchrechnen+division+aufgaben+pdf', which is a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct users to malicious content. The file's structure and the presence of numerous external links indicate a tactic to distribute further malicious content or phishing pages.

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=bruchrechnen+division+aufgaben+pdf
    • http://files.pinehawk-knives.com/uploads/1/3/1/4/131438156/xoref-bijagoxolupuv.pdf
    • http://files.keepcalmandkickals.com/uploads/1/3/0/8/130874058/7650393.pdf
    • http://jokivipis.swaneparchment.com/uploads/1/3/2/6/132682076/4237555.pdf
    • http://files.royalcapitalholdings.net/uploads/1/3/1/4/131484328/1770359.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5908/files/luladasuziwuguzaka.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/como_fazer_uma_carta_de_apresentao_de_uma_empresa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0757/4179/files/28634715446.pdf
    • https://cdn.shopify.com/s/files/1/0435/1400/3610/files/accuweather_jamestown_ny.pdf
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/segegajejexuxuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/28337345966.pdf
    • https://cdn.shopify.com/s/files/1/0439/2756/8552/files/adjectives_worksheets_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/wovokolorapetas.pdf
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/90372735278.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/sixezaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/9735/7472/files/oxford_dictionary_version.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/wezivofugogo.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_off000064c1.bin
0df6281ad6f95e5c62a099abe47028afb6ea15e872f817990d24ec021c99f250
pdf-font-stream PDF embedded font (sfnt) at offset 0x64C1 5436 bytes
font_01_sfnt_off00007736.bin
7431f448f55e53cd3144861219623b0a758c997db6948055e0aa363fe75f090f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7736 10964 bytes
font_02_sfnt_off00009b1c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B1C 4324 bytes