Malicious PDF — malware analysis report

Static analysis result for SHA-256 0890a613fe25b3b2…

MALICIOUS

PDF

43.9 KB Created: 2020-08-04 11:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18083ce0b4a38255e4c132a7bd75ffff SHA-1: 24f38b0c75bef675747c875dc2f04027682ea789 SHA-256: 0890a613fe25b3b26340d59b1bb9dab170f8c61eda474f8aca2e6e47a4758981
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=2d+and+3d+animation+techniques+pdf', which is flagged as a malicious redirector. This indicates the file's primary purpose is to redirect users to potentially harmful 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=2d+and+3d+animation+techniques+pdf
    • http://files.treeservicesanclemente.com/uploads/1/3/0/8/130814043/613bd7187bec.pdf
    • http://pukasidom.top-tungsten.com/uploads/1/3/1/4/131453284/755944.pdf
    • http://files.neukappadelta.com/uploads/1/3/0/7/130738513/89d5b4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5337/5897/files/72030989508.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5359/files/meruxirevufozesofobirigom.pdf
    • https://cdn.shopify.com/s/files/1/0430/5800/4117/files/powixaxefekegudez.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21086069096.pdf
    • https://cdn.shopify.com/s/files/1/0429/5278/6074/files/gadejikaguteka.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/degotumikotimimena.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/22170976611.pdf
    • https://cdn.shopify.com/s/files/1/0432/5641/4363/files/68465105083.pdf
    • https://cdn.shopify.com/s/files/1/0434/6403/2421/files/vogapesokaxefe.pdf
    • https://cdn.shopify.com/s/files/1/0433/4993/4231/files/61922025842.pdf
    • https://cdn.shopify.com/s/files/1/0431/2973/3282/files/20137311558.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_off00006d95.bin
020a56726d8ac6c7665714a6ab5890407a208aa0487e34371f3964122ab74945
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D95 5596 bytes
font_01_sfnt_off00008078.bin
8e1fb9796e63d58e513913cdcd38ef9aa34b1b3cad538a9aef04fc4e9be66545
pdf-font-stream PDF embedded font (sfnt) at offset 0x8078 10096 bytes