Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e22ed80cb709f49…

MALICIOUS

PDF

64.6 KB Created: 2020-08-05 06:06:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7be3a472d285139273f332878374503 SHA-1: 3cadef700c50267339a63e1e1f85232720a7d905 SHA-256: 0e22ed80cb709f493bf52a8d1c07296a9aff3b76146f9b6531c11b2c309453b2
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific URL, 'https://ttraff.cc/pify?keyword=alcoholismo+y+tabaquismo+en+adolescentes+pdf', which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to the URL's keyword, suggesting a lure. The presence of numerous external PDF links indicates an attempt to manipulate search engine results or distribute further malicious 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.cc/pify?keyword=alcoholismo+y+tabaquismo+en+adolescentes+pdf
    • http://files.spjgt.com/uploads/1/3/1/3/131381044/jawifilajuves_favopox.pdf
    • http://files.tauroafarmandwildexperience.com/uploads/1/3/0/8/130874180/xipakiduvijepiworu.pdf
    • http://sobos.brandonssandbox.com/uploads/1/3/1/3/131380600/xozodugakidilaliviwa.pdf
    • http://mekif.mylittleschooltoronto.com/uploads/1/3/0/7/130739826/4c12640653a7e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/7717/9294/files/acreditao_hospitalar_ona.pdf
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/birads_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/5110/3894/files/random_number_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/78578994097.pdf
    • https://cdn.shopify.com/s/files/1/0432/7741/8656/files/rawadawavemamej.pdf
    • https://cdn.shopify.com/s/files/1/0435/4958/9668/files/91881052341.pdf
    • https://cdn.shopify.com/s/files/1/0435/2737/2955/files/65158696269.pdf
    • https://cdn.shopify.com/s/files/1/0435/0076/5336/files/memaxepesolujin.pdf
    • https://cdn.shopify.com/s/files/1/0439/5496/2590/files/16736279039.pdf
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/83230196437.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/zutegubiwo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2690/6261/files/neoplasma_tulang.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_off0000ba31.bin
e8976f69f2ff30ac5ffd8e83f13d7887b41e85a16fc0afa2682118e77fcbab2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA31 5656 bytes
font_01_sfnt_off0000cd4c.bin
6eb4c91dcef32ffa9031c7453836c95d1fdf180fe44b23b5bea58bd1aec1d6af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD4C 11692 bytes

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