Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d58b2138f09ed15…

MALICIOUS

PDF

33.1 KB Created: 2020-08-01 17:31:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6c23a4fcc4566adc3cbcc8b99a4ea5e SHA-1: d05ab660a452564bb2a145d63f4b4d026caeb162 SHA-256: 0d58b2138f09ed15b70067a28ad28df80165f7fbd9d55ef8e0470721707ca159
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the primary function of the PDF is to lure users to malicious websites, likely for phishing or further malware delivery.

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=dancing+man+gif
    • http://files.gretchenkelleywrites.com/uploads/1/3/1/3/131398560/7366450b08c.pdf
    • http://files.soupsatthestation.com/uploads/1/3/0/9/130969065/pisodewa-dabovifafekazo-wijet-foxekiwu.pdf
    • http://files.luckytakoyaki.com/uploads/1/3/1/0/131070207/tezivadibera_fugefekedige.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80023348890.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/rofarovofejujivemigapel.pdf
    • https://cdn.shopify.com/s/files/1/0434/4430/6086/files/47115353066.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/teragosufeguku.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/senizinidakuxivopoviwig.pdf
    • https://cdn.shopify.com/s/files/1/0432/7335/5424/files/piwubivimemenided.pdf
    • https://cdn.shopify.com/s/files/1/0437/3548/2517/files/89711079821.pdf
    • https://cdn.shopify.com/s/files/1/0433/4216/8218/files/webidodawuvemesiwuletut.pdf
    • https://cdn.shopify.com/s/files/1/0433/3384/5150/files/simajafowovubuti.pdf
    • https://cdn.shopify.com/s/files/1/0428/6568/8743/files/jozeroruwedonaxok.pdf
    • https://cdn.shopify.com/s/files/1/0432/6853/8521/files/51986041097.pdf
    • https://cdn.shopify.com/s/files/1/0436/9186/8310/files/fazexetubupa.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_off0000456b.bin
f79d4e502a0ebbf19479bbb3e7d4dc2b99270d9eff22638b286ab2ba198929a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x456B 4892 bytes
font_01_sfnt_off00005610.bin
1463f58402202d4257f64a1de2d03ea05679db52c0b34ac1653b24a764f0678e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5610 9972 bytes