Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5d1a1516cf98ffd…

MALICIOUS

PDF

57.4 KB Created: 2020-08-20 23:56:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac0d5a728e91a104c4cff7bcfabb53b0 SHA-1: 0b85cf1b8bb0ff2c9aa556b040eb4ac8e9098f57 SHA-256: a5d1a1516cf98ffd4980e54d7d241db9b72688d45baa02e64901cbb74d04fdf1
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link to 'ttraff.ru' is identified as a malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the intent is to lure the user to this site. The presence of numerous PDF links and a redirector indicates a link farm or phishing attempt.

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.ru/pify?keyword=in+conclusion+meme+template
    • http://nepazalu.joleanes.com/uploads/1/3/1/3/131398140/palupolajoj_nevegejusasalu.pdf
    • http://files.thecovenantschristandyou.com/uploads/1/3/1/3/131379434/94345039.pdf
    • http://files.learningcafe.us/uploads/1/3/0/9/130969469/be49303.pdf
    • http://files.ljnkyle.com/uploads/1/3/0/7/130739377/lalumitanalejokoruk.pdf
    • http://files.melrosechristianschoolhouse.com/uploads/1/3/0/9/130969837/notelipavewaf-texijofevig.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/jelevefizisexel.pdf
    • https://cdn.shopify.com/s/files/1/0436/9078/6969/files/63408551824.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7545/files/jaloj.pdf
    • https://cdn.shopify.com/s/files/1/0430/3139/6503/files/e6_8a_96_e9_9f_b3.pdf
    • https://cdn.shopify.com/s/files/1/0434/8005/5974/files/77963834442.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8548/files/tirikefoxogunebibanojobi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7813/1611/files/lagefifamuverepazuwifewe.pdf
    • https://cdn.shopify.com/s/files/1/0463/4676/4450/files/ielts_academic_task_1_vocabulary.pdf
    • https://cdn.shopify.com/s/files/1/0434/5823/2473/files/ultrasound_guided_spinal_accessory_nerve_block.pdf
    • https://cdn.shopify.com/s/files/1/0437/2345/6661/files/26269432047.pdf
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/tevegikapu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0281/4876/files/42070448258.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_off00009843.bin
f3e49763859014788895c66fc58db3753094c10b7993da00a239643cc4cf31f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9843 4920 bytes
font_01_sfnt_off0000a8e2.bin
c0c1267df5b133bd41da55fb1d1bbd3636d16f6a48ce3f7458a0d36886cbfba8
pdf-font-stream PDF embedded font (sfnt) at offset 0xA8E2 15308 bytes