Malicious PDF — malware analysis report

Static analysis result for SHA-256 663b9ac58cf0702d…

MALICIOUS

PDF

39.4 KB Created: 2020-08-26 05:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bde3059058a91ee264d9c1ba986e1ab0 SHA-1: 2a485dbadc49eced53de8420cf02587a30c56c28 SHA-256: 663b9ac58cf0702d7f675f9e966993ced4bdc666d6753ee6098b9db9e839ccd4
154 Risk Score

Malware Insights

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

This PDF document is identified as malicious due to its function as a redirector to known malicious infrastructure. It contains a large number of embedded links, many pointing to PDF files hosted on Shopify, which is indicative of a link farm or SEO manipulation tactic. The primary malicious URL identified is https://ttraff.ru/pify?keyword=example+of+final+year+project+report, which is likely used to funnel victims to 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.ru/pify?keyword=example+of+final+year+project+report
    • http://files.marziagaggioli.com/uploads/1/3/1/3/131384071/3410028.pdf
    • http://files.flo-kelvinfreelance.com/uploads/1/3/0/7/130775228/4109352.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/0669/5320/files/jamawafuragijudamu.pdf
    • https://cdn.shopify.com/s/files/1/0462/5625/9221/files/15641671166.pdf
    • https://cdn.shopify.com/s/files/1/0432/3888/3485/files/judefapujo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3346/7808/files/vagusu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9531/7911/files/tokusojosikuxeserikes.pdf
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/tuziwikem.pdf
    • https://cdn.shopify.com/s/files/1/0432/3321/4621/files/suwada.pdf
    • https://cdn.shopify.com/s/files/1/0439/3140/2395/files/95044986062.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/41092030407.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/webomobituwisumepepaxifi.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_off000054d3.bin
41b381cde0c0e43efe4ff49b463310476414b9e3779e3662322f89fd577878f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x54D3 5188 bytes
font_01_sfnt_off00006680.bin
08f1ad29110110c168f48e2e4aae2cbe33be7fc7b2c1062fa89e4c9e63f0e08e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6680 12860 bytes