Malicious PDF — malware analysis report

Static analysis result for SHA-256 e131fbf6cb602ff8…

MALICIOUS

PDF

70.3 KB Created: 2020-08-18 16:24:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fe03d746651434771359dd985a54393 SHA-1: c4dbb2918948883ee8e41a70f803327e59cfe1d9 SHA-256: e131fbf6cb602ff84908ec8e4eed4c2704b6969125b56d7c4d85ac37826b3418
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=android+bitmap+image+from+drawable'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the malicious URL, suggesting the document's primary purpose is to redirect users to this malicious site, likely for phishing or malware distribution.

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.ru/pify?keyword=android+bitmap+image+from+drawable
    • http://files.ohiothunderbasketball.com/uploads/1/3/1/4/131410094/380e28498.pdf
    • http://files.uvicscuba.com/uploads/1/3/1/3/131380786/96ee1.pdf
    • http://vaduxudov.jameslfoxphotos.com/uploads/1/3/0/7/130776791/fawuji.pdf
    • http://files.carollynkavanagh.com/uploads/1/3/1/4/131483214/pebijan.pdf
    • http://files.mephgcoftexas.org/uploads/1/3/0/9/130969489/f33031d.pdf
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/4251399701.pdf
    • https://cdn.shopify.com/s/files/1/0430/5548/0981/files/free_printable_esl_worksheets_for_high_school.pdf
    • https://cdn.shopify.com/s/files/1/0431/5712/7336/files/lowes_salina_ks.pdf
    • https://cdn.shopify.com/s/files/1/0434/0485/3406/files/sufujatanup.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63545483179.pdf
    • https://cdn.shopify.com/s/files/1/0432/7967/9656/files/wexoju.pdf
    • https://cdn.shopify.com/s/files/1/0434/0583/6444/files/amgdalas_cerebrales.pdf
    • https://cdn.shopify.com/s/files/1/0435/9605/4690/files/o_reilly_python_for_data_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0434/2163/0631/files/66138072306.pdf
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/32600198463.pdf
    • https://cdn.shopify.com/s/files/1/0433/7221/6483/files/memuwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7967/1718/files/dokodabesumumuxijeduj.pdf
    • https://cdn.shopify.com/s/files/1/0435/9569/4239/files/drama_china_beautiful_reborn_flower.pdf
    • https://cdn.shopify.com/s/files/1/0440/8459/2805/files/23648490769.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_off0000c809.bin
f67fe87a5d5f7587e18b55df303ff3de6cefe3bd92369af353d87aae1c2a0c8a
pdf-font-stream PDF embedded font (sfnt) at offset 0xC809 5404 bytes
font_01_sfnt_off0000da5f.bin
63e9154eac21707d3b1b994da43df1038261f368c9d32355c7d1fabe996d58c6
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5F 15668 bytes