Malicious PDF — malware analysis report

Static analysis result for SHA-256 6841127658e68274…

MALICIOUS

PDF

39.1 KB Created: 2020-08-21 17:16:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34155bf5131b6afafc1ec9ce11e3a75d SHA-1: d39fd94f266836afbbdd28eb43d3e8fee9563135 SHA-256: 6841127658e68274e693f518ebe422aafbdfaf4a512323814c8b1579665793f9
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=burnham+boiler+parts+manual', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for "Burnham boiler parts manual". The presence of numerous external PDF links, many pointing to Shopify, suggests a link farm or SEO manipulation tactic. No scripts were extracted, but the malicious redirector indicates an attempt to lead the user to a malicious site.

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=burnham+boiler+parts+manual
    • http://files.anassafehavenrescue.org/uploads/1/3/1/8/131856949/cd26ae50f5e1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7939/1637/files/vinuginogudilevorexuna.pdf
    • https://cdn.shopify.com/s/files/1/0436/2554/5890/files/minecraft_ic_permission_nodes.pdf
    • https://cdn.shopify.com/s/files/1/0438/9791/3512/files/before_i_fall_libro_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0436/7309/2246/files/77659806971.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/keto_friendly_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0427/8163/8812/files/pobamowaguwel.pdf
    • https://cdn.shopify.com/s/files/1/0437/9131/9200/files/angularjs_2_tutorial_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/3858/7552/files/93163946642.pdf
    • https://cdn.shopify.com/s/files/1/0433/9862/7495/files/python_download_image_from_url.pdf
    • https://cdn.shopify.com/s/files/1/0440/0388/5206/files/kifepixekuru.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/angular_material_template_free_github.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4432/files/memake.pdf
    • https://cdn.shopify.com/s/files/1/0430/6229/6725/files/java_web_project.pdf
    • https://cdn.shopify.com/s/files/1/0434/6655/5558/files/forklift_certification_wallet_card_template_free.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_off0000594d.bin
f189586b662d47e695cc62f8461b2c886d43cadf8a16be05515c4cba8ba932de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x594D 5248 bytes
font_01_sfnt_off00006aec.bin
1d6f87607fd698fcddb2d32da9fba73ce3cd65c17a232bb131f1419afa3efe41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AEC 10828 bytes

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