Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce4da228aa8b4ed…

MALICIOUS

PDF

44.1 KB Created: 2020-08-31 10:38:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa84091e2fb9432582af407b764bea69 SHA-1: 5d346ef1e21b6c1abd9b54263674b0fd549221aa SHA-256: 9ce4da228aa8b4ed51e17aa75d6f9fa43d22c096b588d7b1b0fb070cf77d61ae
150 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious infrastructure, indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'figurative language in romeo and juliet' and a URL that points to a redirector. The PDF_SEO_LINK_FARM heuristic also indicates a large number of external links, suggesting a link farm or spamming technique. The ML classifier strongly flagged this PDF as malicious.

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.com/wix?keyword=figurative+language+in+romeo+and+juliet
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/buat_email_gmail_di_android.pdf
    • https://cdn.shopify.com/s/files/1/0435/4460/8932/files/gmail_for_windows_10_pro.pdf
    • https://cdn.shopify.com/s/files/1/0437/5619/1893/files/bol_bam_ke_gana_hd_video.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/jotomenup.pdf
    • https://cdn.shopify.com/s/files/1/0430/5027/0869/files/rukujizelekujivaxuxe.pdf
    • https://cdn.shopify.com/s/files/1/0437/8814/0696/files/saditumure.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf155e1798dc4d58ad38a62e6c9f8df3.pdf
    • https://static.usrfiles.com/ugd/1b8612_ef2144275c384d0a97592f751eee6558.pdf
    • https://static.usrfiles.com/ugd/a6e5e9_b710d7833c9b49bf8d62900df4314050.pdf
    • https://static.usrfiles.com/ugd/b8c837_ee97749bb1d04e2f90c42d5872c6ea91.pdf
    • https://static.usrfiles.com/ugd/9c43ec_7a830cb56e8246e49a545dc4b1a229fd.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/tukinap.pdf
    • https://cdn.shopify.com/s/files/1/0433/6179/6248/files/zupesefazibosopunakuw.pdf
    • https://cdn.shopify.com/s/files/1/0435/6295/9006/files/51334033059.pdf
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/zekenekuvixixaworuwolede.pdf
    • https://cdn.shopify.com/s/files/1/0433/6674/4216/files/harmonic_patterns_cheat_sheet.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_off00006fc3.bin
2cd16990009107102960163f5689ad478873ff5fd46e97bfb611b13fe39a409d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC3 5060 bytes
font_01_sfnt_off000080f0.bin
7253df2d868d1ab89d09efdd80f1cb1ee010f6fa82193ab919c628526df0566d
pdf-font-stream PDF embedded font (sfnt) at offset 0x80F0 9988 bytes