Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2ec8a8879c12d07…

MALICIOUS

PDF

35.0 KB Created: 2020-08-20 18:50:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2557d06c226c50cb6dbbdab63f4e556 SHA-1: bbd7c047a3f7283ce9ceaa7078de4e1a4605eb0c SHA-256: e2ec8a8879c12d07e0a501c81d4bcec1fb5d25c061d947ca8239dd43f1c49742
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised with a search query related to 'Bahubali 2 movie ringtones telugu'. The document body also contains this URL and numerous other links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack pattern is redirection to malicious infrastructure.

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=bahubali+2+movie+ringtones+telugu
    • http://zetusopup.augustjaccaci.com/uploads/1/3/2/6/132681946/9935796.pdf
    • http://files.fiberenvy.net/uploads/1/3/2/7/132710772/mijagosoziduxazazimi.pdf
    • http://files.lightningridgerealestate.com.au/uploads/1/3/0/7/130776499/bimevojul.pdf
    • https://cdn.shopify.com/s/files/1/0434/3886/6584/files/alexa_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6219719719.pdf
    • https://cdn.shopify.com/s/files/1/0428/0995/0367/files/buzafix.pdf
    • https://cdn.shopify.com/s/files/1/0434/2690/6261/files/38498456411.pdf
    • https://cdn.shopify.com/s/files/1/0435/6449/9105/files/pomelo_camera_pro_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/4017/7314/files/kabofitu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7250/files/73625234929.pdf
    • https://cdn.shopify.com/s/files/1/0431/3156/8277/files/72765665020.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/orbit_timer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/2934/9030/files/98637838508.pdf
    • https://cdn.shopify.com/s/files/1/0433/0140/4830/files/86059587539.pdf
    • https://cdn.shopify.com/s/files/1/0435/8494/6333/files/capacity_utilization.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_off00004bd0.bin
a32115c1d590cdf9d041ee7cb562bbecca7a9422f3b002f332972dc377269efa
pdf-font-stream PDF embedded font (sfnt) at offset 0x4BD0 5480 bytes
font_01_sfnt_off00005e54.bin
7d8ac57a89ad10b54f19551249a077ed32a9f7f3006b0ce33f848ec91460f7a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E54 9684 bytes