Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7e9e3118c3cdce…

MALICIOUS

PDF

100.6 KB Created: 2020-08-12 05:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd6f6818153c8094bb36b7446a5e5fb7 SHA-1: 2431a22ce512c0fef23e249964b7eb32514a03cf SHA-256: ee7e9e3118c3cdce15b85f4e8c904dcc5db5ac7e6e2f2013d7af87583227b471
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wb?keyword=spanish%20conquest%20of%20america%20pdf', suggesting a lure to download a PDF. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it's designed for malicious redirection.

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/wb?keyword=spanish%20conquest%20of%20america%20pdf
    • http://jiviro.fleurdemain.com/uploads/1/3/1/4/131406390/nilakixepila.pdf
    • http://files.exploreshc.com/uploads/1/3/1/3/131380892/6984761.pdf
    • http://remena.brittanyrhager.com/uploads/1/3/1/1/131163953/f0bf3e43f.pdf
    • http://files.xlsoftfruit.co.uk/uploads/1/3/1/8/131857315/0ae2741e3d.pdf
    • https://cdn.shopify.com/s/files/1/0441/1247/8360/files/faluv.pdf
    • https://cdn.shopify.com/s/files/1/0432/2669/3789/files/kagipurareme.pdf
    • https://cdn.shopify.com/s/files/1/0431/7213/5074/files/daratogak.pdf
    • https://cdn.shopify.com/s/files/1/0427/3537/0407/files/cut_free_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/derawuxij.pdf
    • https://cdn.shopify.com/s/files/1/0434/3260/7900/files/40829574960.pdf
    • https://cdn.shopify.com/s/files/1/0433/3164/9689/files/6319378176.pdf
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/ryan_aerator_parts.pdf
    • https://cdn.shopify.com/s/files/1/0435/6882/4488/files/20128951135.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/55332550414.pdf
    • https://cdn.shopify.com/s/files/1/0431/5784/8224/files/kuwigafumigusovawem.pdf
    • https://cdn.shopify.com/s/files/1/0440/6896/2469/files/26343034943.pdf
    • https://cdn.shopify.com/s/files/1/0431/0440/3613/files/99890213468.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_off000143f8.bin
8f81ad33acdf32c1bb2d9ff2a20aad73be12cd8fc5f3c8042d85905953a2d79d
pdf-font-stream PDF embedded font (sfnt) at offset 0x143F8 5592 bytes
font_01_sfnt_off000156c1.bin
b4c287d515f6ac93c34782fe4a429ff45a57e5802c0996cfd1d82172668c91c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x156C1 14716 bytes