Malicious PDF — malware analysis report

Static analysis result for SHA-256 222da1d15561c1ca…

MALICIOUS

PDF

43.9 KB Created: 2020-08-18 23:23:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f2a9d6db7734744be3b946e495bba9b SHA-1: 192c9d7c8fc8ab6d39020457049705d782900eea SHA-256: 222da1d15561c1cadab795613717e61b478cf2e62bcc184939963abd84d24084
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One of the embedded URLs, https://ttraff.ru/pify?keyword=les+aliments+riches+en+fibres+pdf, is identified as a known malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a lure to disguise the malicious intent. No scripts were extracted, but the primary attack vector appears to be the malicious redirection via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=les+aliments+riches+en+fibres+pdf
    • http://files.tilleyrent.com/uploads/1/3/1/3/131379110/448810.pdf
    • http://soxotataw.bulldogsread.com.au/uploads/1/3/1/6/131636813/50c17.pdf
    • https://cdn.shopify.com/s/files/1/0433/9063/2101/files/anchor_bolt_standard.pdf
    • https://cdn.shopify.com/s/files/1/0436/5480/7717/files/the_jaunt_stephen_king.pdf
    • https://cdn.shopify.com/s/files/1/0435/9979/0237/files/ielts_academic_writing_task_1_samples_with_answers_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49186839350.pdf
    • https://cdn.shopify.com/s/files/1/0429/9846/4661/files/68104550676.pdf
    • https://cdn.shopify.com/s/files/1/0437/9649/6544/files/pronunciation_tips_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0439/3215/6059/files/83126035612.pdf
    • https://cdn.shopify.com/s/files/1/0432/5149/9170/files/physiology_of_pregnancy_and_lactation.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/43797202167.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069aa.bin
b890bc2b662513c2aa479c32aff2f82e264ca42e636944af814c1baf25816eb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69AA 5476 bytes
font_01_sfnt_off00007c0d.bin
54674998cc1aacea6dd485f646870ad797f656a8e257894c8ec40d55d707b990		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C0D 11876 bytes

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