Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fa2984a90764cfe…

MALICIOUS

PDF

54.0 KB Created: 2020-08-25 05:14:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0223f73d7e03adbe7c6bd2638d5e9ca SHA-1: d496e1651ba549a0dffc74bbd7f2b349788cb21c SHA-256: 5fa2984a90764cfe893ef4e09e522723586c0b55671a6550609970026cd7d36a
154 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, including one pointing to a known malicious redirector at `https://ttraff.ru/pify?keyword=blazor+bootstrap+template`. The document body, though heavily obfuscated, also contains this URL and a list of other Shopify-hosted PDF links, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious.

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=blazor+bootstrap+template
    • http://tifezol.nowmetoo.com/uploads/1/3/1/6/131636648/da8bfbd62a8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/30898665142.pdf
    • https://cdn.shopify.com/s/files/1/0430/9316/4199/files/pdf_bjt_transistor.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/notipawowamoke.pdf
    • https://cdn.shopify.com/s/files/1/0437/8977/9106/files/kunebegapog.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20931566490.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/83665528605.pdf
    • https://cdn.shopify.com/s/files/1/0431/8140/8420/files/tamil_film_sindhu_bhairavi_songs.pdf
    • https://cdn.shopify.com/s/files/1/0434/1805/8901/files/waxafivowuxoduwob.pdf
    • https://cdn.shopify.com/s/files/1/0438/0501/6226/files/the_birdcage_cast.pdf
    • https://cdn.shopify.com/s/files/1/0462/6622/0695/files/flaine_snow_report_january.pdf
    • https://cdn.shopify.com/s/files/1/0431/5624/2581/files/rename_multiple_columns_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0433/5792/9621/files/zisovetu.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_off000082ea.bin
11d8f2eea8f6d85a3cefde15c6660aa3fe21195ea51fa95a148d01cd29111c75
pdf-font-stream PDF embedded font (sfnt) at offset 0x82EA 5204 bytes
font_01_sfnt_off00009486.bin
b1c3c5f8ee20e302c27aeb191bed85e923ca4bd8b6246f33c06f61a957f3dd9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x9486 17028 bytes