Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2d8fa0d76a70c79…

MALICIOUS

PDF

37.6 KB Created: 2020-08-14 15:40:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa25cad7db522cf4c137706212f288e7 SHA-1: 0e0a619f54dc2fc2aa6f2e45ca6e0c30833c5e7b SHA-256: a2d8fa0d76a70c797d6beea187dd00415acd70784b3c964e32f19b00ad6c14e0
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a machine learning classifier and contains a significant number of embedded links, many pointing to external PDF files. One critical heuristic indicates a link to known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=alsager+school+6th+form', suggesting a lure related to 'alsager school 6th form'. The presence of numerous Shopify links, while many are benign, contributes to the overall link farm characteristic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=alsager+school+6th+form
    • http://files.jordangirardin.com/uploads/1/3/0/7/130776037/1d84114.pdf
    • https://cdn.shopify.com/s/files/1/0434/1609/2828/files/cape_biology_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gekubamunanapomokavonata.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/97636386638.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/51827394317.pdf
    • https://cdn.shopify.com/s/files/1/0451/4159/0170/files/amours_solitaires.pdf
    • https://cdn.shopify.com/s/files/1/0432/7469/8902/files/2639624701.pdf
    • https://cdn.shopify.com/s/files/1/0433/9938/1146/files/classroom_objects_coloring_pages.pdf
    • https://cdn.shopify.com/s/files/1/0432/7515/7670/files/99883959749.pdf
    • https://cdn.shopify.com/s/files/1/0432/7433/8454/files/90562155005.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wifufokamavobopizevotug.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_off00005503.bin
1f440f5b453736408c81c24b2caf7c1c629ea398387cd8f13a6e90c99c9cede5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5503 5440 bytes
font_01_sfnt_off0000675c.bin
7bea5afefc8a25e0129f43290668d01f472f774d7915d53867a5f8e33bc50536		 pdf-font-stream PDF embedded font (sfnt) at offset 0x675C 10236 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.