Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b9d5f0fa90abcfe…

MALICIOUS

PDF

67.5 KB Created: 2020-08-14 18:50:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 293d8129be5018950b29b53f55a308ed SHA-1: 26da8b5acffa0b1a9fb4ae6098f9804b192cee3c SHA-256: 2b9d5f0fa90abcfe5b823036be23dc6c93f5c36a5865bed058c52bea35e43105
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=api+soundcloud+won%2527+t'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the same redirector URL and references to Shopify-hosted PDFs, reinforcing the attack pattern.

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=api+soundcloud+won%2527+t
    • http://zafoxo.omundoeolimite.com/uploads/1/3/1/8/131855997/fuwurowunewil.pdf
    • http://favov.imadeaver.com/uploads/1/3/1/4/131437871/c6ba5e678d16f43.pdf
    • http://files.productcampsg.com/uploads/1/3/2/3/132303083/derifusuravevarun.pdf
    • http://files.spiritwordchurch.co.uk/uploads/1/3/1/4/131407102/fudibenejupide.pdf
    • https://cdn.shopify.com/s/files/1/0434/0085/5706/files/60217661660.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/wivoxepog.pdf
    • https://cdn.shopify.com/s/files/1/0430/6075/6641/files/73671213766.pdf
    • https://cdn.shopify.com/s/files/1/0435/2973/2248/files/73110030431.pdf
    • https://cdn.shopify.com/s/files/1/0432/9390/0958/files/fefenofunibupag.pdf
    • https://cdn.shopify.com/s/files/1/0437/2607/8106/files/xowozozedixipusugiporoju.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84312174386.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7922/files/63367923077.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/13589286567.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2250/files/house_rental_agreement_format_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0431/0089/7440/files/ansys_help_viewer.pdf
    • https://cdn.shopify.com/s/files/1/0431/7301/9797/files/cinema_apk_ad_free_1._3._2.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_off0000c4df.bin
588641756ff500be0aeb7d59fdd66e5a78a159a27a4f1fa9ffa3e97349324e8b
pdf-font-stream PDF embedded font (sfnt) at offset 0xC4DF 4876 bytes
font_01_sfnt_off0000d599.bin
e03733e049bea0314d0d7aea89d842412021b496e61f40620694731363d6a235
pdf-font-stream PDF embedded font (sfnt) at offset 0xD599 13412 bytes