Malicious PDF — malware analysis report

Static analysis result for SHA-256 460df17434e7d807…

MALICIOUS

PDF

109.6 KB Created: 2020-08-02 16:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c4cf7805398778de49c1ca6f1a3d8439 SHA-1: 2aeb2ac1eb9cd84c46659381b25c2ca6285b2435 SHA-256: 460df17434e7d807f2170e07fccda0e667971d9831ac5ca09616ad4b6ed69766
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.ru/pify?keyword=austin+beier+hudl'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct users to malicious infrastructure. The presence of numerous external PDF links further indicates a link farm or redirection strategy, likely to distribute malware or conduct phishing.

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=austin+beier+hudl In PDF document text
    • http://files.dsynced.com/uploads/1/3/1/1/131163738/pimosuzokekivazilo.pdfIn PDF document text
    • http://files.cambridgeburlesque.co.uk/uploads/1/3/0/7/130739916/93a6ab0e35d1.pdfIn PDF document text
    • http://files.cemeterydays.com/uploads/1/3/1/0/131070842/modakavine.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6766/9654/files/43031523192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/dopavin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5397/9550/files/60905851577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/xematatuwatabukurof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3865/2054/files/what_is_snooze_in_gmail.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5017/1554/files/91347425714.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6108/4322/files/religofuna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/levudopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4029/1486/files/fenufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0785/1171/files/jegebiwepopur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/fofejefilij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5193/3078/files/nirukidavugodevulapiziwux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4074/1275/files/71249546139.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2317/8656/files/29987820377.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17399 4832 bytes
SHA-256: 1df37ef82932126ea5ddade384eb277b270a334bf418da06082689ac8d0cb4a8
font_01_sfnt_off000183fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x183FC 10932 bytes
SHA-256: e3b8736ca55b15522f6ec4934a658930e3098b541d4c04c3b39c4c11cc2a0922

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