Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a4bf52fefdf12f…

MALICIOUS

PDF

39.7 KB Created: 2020-08-08 18:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6c3a66713184efea025eef47b144d66 SHA-1: 73d367d4968866251dd697b3fba115dca95d6013 SHA-256: e9a4bf52fefdf12fe792e2e621fc72796f1b47a70f49f8174c6abe5d3e8e2dce
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the ultimate destination and potentially for SEO manipulation.

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=amenagement+du+territoire+au+mali+pdf
    • http://files.shadesbyshanni.com/uploads/1/3/1/4/131408537/vowofufoxomuvumewib.pdf
    • http://files.arabicwithnadia.com/uploads/1/3/1/4/131407549/5607946.pdf
    • http://files.kristinrmt.ca/uploads/1/3/1/4/131438046/4056058.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/bulijovepav.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tokon.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3820/files/60465154320.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/76292738821.pdf
    • https://cdn.shopify.com/s/files/1/0429/6228/8793/files/77423984786.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/6th_grade_essay_writing_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/46797656438.pdf
    • https://cdn.shopify.com/s/files/1/0430/3582/0185/files/tuzigi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6925/0463/files/lufegenitugalepopi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/bebukivupalo.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_off000058c3.bin
dcfe3018eebcb29a0ff210719a5c34f73d07ba0fbbfa3579e34623553de793b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x58C3 5172 bytes
font_01_sfnt_off00006a44.bin
30e452203d258b47387b1b1c8afb7acbf148117950305035076ab0a6f41ab5e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A44 12240 bytes