Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba77a77ce9d3485f…

MALICIOUS

PDF

34.0 KB Created: 2020-08-18 17:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21ddc3872c994853a872e849e3923356 SHA-1: 2afebf0cdfbf6c8fb11d39d1290840003ce4d651 SHA-256: ba77a77ce9d3485fa11bf68182da6a47d0f7fdab3eec4bc52a8c7bae4fc6242b
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.com/pify?keyword=arjun+reddy+movie+kiss+scenes'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and other embedded links, suggesting a lure to external 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.com/pify?keyword=arjun+reddy+movie+kiss+scenes
    • http://wusesov.jamesbrearley.com/uploads/1/3/1/0/131070450/tidulamatoso-lenigumogej-fires.pdf
    • http://files.spicepeppergarden.com/uploads/1/3/1/4/131438137/jugim-rezurawebogatar-bexudojekav.pdf
    • https://cdn.shopify.com/s/files/1/0435/4513/3207/files/brene_brown_parenting_manifesto.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/jakifol.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1642/files/68607117239.pdf
    • https://cdn.shopify.com/s/files/1/0435/6279/5171/files/rilerugobewebikex.pdf
    • https://cdn.shopify.com/s/files/1/0433/3387/7915/files/21638252718.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/zibomowupazilutite.pdf
    • https://cdn.shopify.com/s/files/1/0433/6225/5006/files/jolelelobozidalalofazu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3503/2737/files/atharva_veda_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/anemia_microcitica_hipocromica_pdf_adulto.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9423/files/60889051986.pdf
    • https://cdn.shopify.com/s/files/1/0434/1107/9317/files/agricultural_science_textbook_grade_12_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39858795743.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_off000048de.bin
896f4d2ee258d9b967997f9fdb94f52c3cdd0a4f8000f7e25d5f5c3340fb26de
pdf-font-stream PDF embedded font (sfnt) at offset 0x48DE 5132 bytes
font_01_sfnt_off00005a4e.bin
1716354224142ca4c1620a600e040903384f847de020581a552366df7f4c3eb2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A4E 9728 bytes