Malicious PDF — malware analysis report

Static analysis result for SHA-256 24d64cf24f070b15…

MALICIOUS

PDF

59.1 KB Created: 2020-08-28 10:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3f7c1ac1c33af4aa5304d6793d62731 SHA-1: 8b86908fabdb5eccc4b562acb4df87e2bbf165a5 SHA-256: 24d64cf24f070b15477f069d00074f1d57213f88f344a8492c9f7aab6a314b88
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, indicating an attempt to direct users to harmful content. The document body, though heavily obfuscated, contains text related to a camera review and the malicious URL, suggesting a lure. The ML classifier strongly flagged this PDF as malicious.

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=canon+eos+rebel+xsn+review
    • http://files.rosamiliafornjea.org/uploads/1/3/1/6/131636748/jepisuwufawiwa_lorofapalud.pdf
    • http://wuwiv.millslivestockllc.com/uploads/1/3/1/3/131398234/xijol.pdf
    • http://files.sjetr.org/uploads/1/3/2/7/132740275/64fb5533.pdf
    • http://files.susan-mcmahan.com/uploads/1/3/0/8/130873715/nozomuvutimitakanid.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1278/files/best_bokeh_effect_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/5042/5753/files/dupobojaminef.pdf
    • https://cdn.shopify.com/s/files/1/0440/7335/3381/files/84688168773.pdf
    • https://cdn.shopify.com/s/files/1/0468/0338/6517/files/22618497315.pdf
    • https://cdn.shopify.com/s/files/1/0428/5507/1900/files/30445063984.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/61685893977.pdf
    • https://cdn.shopify.com/s/files/1/0429/3463/2607/files/24712618249.pdf
    • https://cdn.shopify.com/s/files/1/0431/9988/9569/files/luwofotulitekajodow.pdf
    • https://cdn.shopify.com/s/files/1/0428/5943/0047/files/access_radgrid_edit_form_control_in_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0428/2790/7239/files/mivumix.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_off0000aa1d.bin
241a9c0adb231a10aeeec2f19cd12a940cb4c4b7ce7abf214ffad401f085bd75
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA1D 4944 bytes
font_01_sfnt_off0000bb12.bin
2ca5bd453e8fa74905bbfac66cbfd2718baa5114126d79b87f7198abe6e22b09
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB12 11180 bytes