Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d206783e5f57415…

MALICIOUS

PDF

33.9 KB Created: 2020-08-25 05:23:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d38140dd09b58c2f8f2d00890723c998 SHA-1: dcb61ba533f6a7dccc85882e915f8fdc24b2da1b SHA-256: 5d206783e5f57415fdb6c29d549744e1bb5c48a7ebcbfc895088dbb74a700edf
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'https://ttraff.ru/pify?keyword=wallpaper+photo+gallery++mp4'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many of which are hosted on Shopify. The ML classifier strongly indicated maliciousness. The document body contains obfuscated text and embedded URLs, suggesting an attempt to disguise malicious links and potentially lure users to download further content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/pify?keyword=wallpaper+photo+gallery++mp4
    • http://wuweki.ramonadynasty.org/uploads/1/3/0/7/130739423/pekirewagul.pdf
    • http://wusos.ashlynnsboutique.com/uploads/1/3/1/4/131437594/tuganixesifatur.pdf
    • http://files.coachhousecochins.com/uploads/1/3/1/0/131069764/1825010.pdf
    • http://bizowilu.goatflowerfarm.com/uploads/1/3/1/4/131438539/fomosuboliluk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9740/0223/files/mega_man_2._5d.pdf
    • https://cdn.shopify.com/s/files/1/0428/3272/4124/files/numbers_in_english_1_to_1000.pdf
    • https://cdn.shopify.com/s/files/1/0430/4830/4797/files/63110907431.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9606/files/35594753877.pdf
    • https://cdn.shopify.com/s/files/1/0428/6529/5526/files/78093145287.pdf
    • https://cdn.shopify.com/s/files/1/0435/0928/5024/files/audit_report_2019_infosys.pdf
    • https://cdn.shopify.com/s/files/1/0429/2578/5255/files/carters_newborn_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/radedinixogape.pdf
    • https://cdn.shopify.com/s/files/1/0428/7909/0855/files/nutonaxebewidiw.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004738.bin
ad16e8fa78313b22e55ee6202564a4d31b4f70aade1a06daae697ddf3bae0804
pdf-font-stream PDF embedded font (sfnt) at offset 0x4738 5256 bytes
font_01_sfnt_off00005913.bin
70ebc63282c894d5cbd4761835f343a8181473bf1e0038f9905a8098e753adb5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5913 10016 bytes