Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa127a6111f2cf1…

MALICIOUS

PDF

69.8 KB Created: 2020-08-31 11:37:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7fca33091a8e600360580fc6429bbb9 SHA-1: 5b3c281ee30a514677b9a556be4c6f2fbe2cdd34 SHA-256: 9aa127a6111f2cf198493ebbc32f1b2580602c1f498b6bd59710b9abb73a2774
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL containing a search query for 'Wu tang clan forever download zip'. This suggests a social engineering lure to trick users into clicking the link. The PDF also hosts a large number of external links, many pointing to Shopify, which is characteristic of SEO link farm abuse for distributing malicious content. No scripts were extracted from this sample.

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/wix?keyword=wu+tang+clan+forever+download+zip
    • https://cdn.shopify.com/s/files/1/0435/5175/2344/files/xisovofa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3095/files/59224080600.pdf
    • https://cdn.shopify.com/s/files/1/0434/4394/5622/files/dixevubus.pdf
    • https://cdn.shopify.com/s/files/1/0447/9864/0288/files/14631190540.pdf
    • https://cdn.shopify.com/s/files/1/0430/2376/1571/files/30775416187.pdf
    • https://cdn.shopify.com/s/files/1/0427/8566/9279/files/cambridge_dictionary_of_philosophy_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0459/0531/3946/files/blackboard_university_of_tampa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1637/1867/files/articles_on_importance_of_education.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/tokovuzeravofi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/porasifotogakekej.pdf
    • https://cdn.shopify.com/s/files/1/0428/4776/4636/files/bigivekazotix.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/kezeratuvazokuwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8271/9136/files/ruluxunizawuwizata.pdf
    • https://cdn.shopify.com/s/files/1/0429/0255/2742/files/mapiwavemakefujidi.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/
    • https://cdn.shopify.com/s/files/1/0447/9864/0288/files/14631190540.pd

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1f8.bin
ba1d7650f686f88cabffcb22e999369fb4b85a2f193a2823b4dd05554f6afca1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1F8 5244 bytes
font_01_sfnt_off0000d3fa.bin
5a0e3ab782019fc56dbd4cf02fcb24b2a1a12f38b0a933ea9097706ed8f4ceef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FA 12236 bytes
font_02_sfnt_off0000fc01.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC01 4324 bytes

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