Malicious PDF — malware analysis report

Static analysis result for SHA-256 6081c36054dfe74a…

MALICIOUS

PDF

78.1 KB Created: 2020-08-14 06:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb96846507193e7dc9037dec5ca3aca1 SHA-1: eef2826eb341e46611e5a9059ed63e8ab70f941a SHA-256: 6081c36054dfe74ab388e664271fb507be06c9be51614c31d18905a921faebd3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL, indicating the primary intent is to redirect users to malicious infrastructure. The presence of a password-protected archive lure heuristic suggests a multi-stage attack where the user is prompted to download an archive, which is then protected by a password provided within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wb?keyword=estado%20social%20de%20derecho%20definicion%20pdf
    • http://xugowa.calhouncountyanimalcenter.org/uploads/1/3/1/1/131164250/zisesatot.pdf
    • http://files.highaspectflighttraining.com/uploads/1/3/1/4/131454699/43e47a14ec6be54.pdf
    • http://files.bjmatthewshomerepair.com/uploads/1/3/0/8/130814774/jakejajutimibotof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/3846/6460/files/chemistry_textbook_class_12_gujarat_board.pdf
    • https://cdn.shopify.com/s/files/1/0433/3171/5225/files/zabuju.pdf
    • https://cdn.shopify.com/s/files/1/0435/5588/1121/files/mawikofuwikixi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/sumusewajilul.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/matamajiwigamuzilusa.pdf
    • https://cdn.shopify.com/s/files/1/0431/9641/6157/files/java_ee_8_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0435/3081/3592/files/81886690894.pdf
    • https://cdn.shopify.com/s/files/1/0437/1388/8424/files/62526626571.pdf
    • https://cdn.shopify.com/s/files/1/0434/6714/5366/files/22242195691.pdf
    • https://cdn.shopify.com/s/files/1/0434/9090/2166/files/59596132494.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6561/files/abdominal_aorta_anatomy.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e393.bin
f6a686632bbebd0fb0b0a60649b0c36b4e49617f2069214a7e2ddd61db817089		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE393 4988 bytes
font_01_sfnt_off0000f46f.bin
937dc10cb5bb0e7d8095dc06ea2588f991b4fd5d42303aef80a668d2ddc0ddcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF46F 12016 bytes
font_02_sfnt_off00011bb1.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB1 4324 bytes

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