Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5c8ea4c3f425693…

MALICIOUS

PDF

58.6 KB Created: 2020-08-12 05:07:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 514f725ee1f95017b81a90bd34ae1ce8 SHA-1: d34c7ec3bd8667633727c4e47a4e22346308bf73 SHA-256: a5c8ea4c3f425693e570fb0956168b2257dd907c08e3fbed0c9a759278cccf4f
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, identified as a link farm. One of the primary links directs to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting the document's purpose is to drive traffic to malicious infrastructure. No scripts were extracted from this sample.

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=nuclear+physics+definition+pdf
    • http://files.chloedee.com/uploads/1/3/1/6/131606490/bojuzilutejikifug.pdf
    • http://lepob.allisonwonderlandc.com/uploads/1/3/1/4/131407148/setovagazos_tifazu_vupuliwaso.pdf
    • http://fofel.rhr-cc.com/uploads/1/3/1/4/131453870/rogamesaxidavuvudag.pdf
    • http://files.dayspringtoday.com/uploads/1/3/1/4/131453206/rejenuxurubaf-veruxaraj.pdf
    • https://cdn.shopify.com/s/files/1/0435/2072/1055/files/41212795025.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/viluvesiboridijopu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/89072041016.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/jotabipazu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/ceclor_bd_500.pdf
    • https://cdn.shopify.com/s/files/1/0437/5543/8234/files/gta4_xbox_360_mods.pdf
    • https://cdn.shopify.com/s/files/1/0440/7571/2664/files/47037954697.pdf
    • https://cdn.shopify.com/s/files/1/0430/6698/2561/files/top_marathi_books_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/fukilajuzimum.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/59214167694.pdf
    • https://cdn.shopify.com/s/files/1/0428/5507/1900/files/motorola_surfboard_sbg6580_login.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_off0000a601.bin
8c434ed3feef791cb36b690556f17810eb93a9cde18be038181d6a1c67e9be31		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA601 5316 bytes
font_01_sfnt_off0000b817.bin
c345bf5bb100671617eb66d7bf6927d727dd382b387291fbf2bd5fe6092f9d61		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB817 10988 bytes

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