Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e916766b4ee5b2…

MALICIOUS

PDF

44.1 KB Created: 2020-07-29 00:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbede96a124e84a801e670a856fdd9c6 SHA-1: d17442da3d8b8e9fd973916d5930abdb664ad597 SHA-256: 06e916766b4ee5b2d749baa5422527d76cf1131341717e8057e3a1c38539d7d9
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, many of which point to a redirector service. The ML classifier strongly indicates maliciousness. The presence of a download button lure further supports a malicious intent to trick the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=chromecast+app+for+windows+10
    • http://files.collinsfamilyhomestead.com/uploads/1/3/0/8/130814106/popenexoke.pdf
    • http://files.chenowethbairddesign.com/uploads/1/3/1/8/131871894/kawal_fudomur.pdf
    • http://files.thesacredyes.com/uploads/1/3/1/4/131408537/3997902.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0034/0381/files/29315328748.pdf
    • https://cdn.shopify.com/s/files/1/0431/6971/0241/files/ximagegikenumomavaxen.pdf
    • https://cdn.shopify.com/s/files/1/0432/7407/6315/files/32281801571.pdf
    • https://cdn.shopify.com/s/files/1/0431/5470/2496/files/minoxotu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9596/4328/files/65027931065.pdf
    • https://cdn.shopify.com/s/files/1/0434/5089/2440/files/pukoluxenanupodibi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5597/1492/files/57979888690.pdf
    • https://cdn.shopify.com/s/files/1/0432/3508/2402/files/64285656873.pdf
    • https://cdn.shopify.com/s/files/1/0440/0077/2246/files/47886712554.pdf
    • https://cdn.shopify.com/s/files/1/0434/7058/6022/files/xafeveteg.pdf
    • https://cdn.shopify.com/s/files/1/0436/2931/4206/files/zafif.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006da5.bin
b1c670e3477d1c8f9c50fb740dc87df2ef9d19f2a6d59d123c5b6826b5b28f9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA5 5460 bytes
font_01_sfnt_off0000801e.bin
f3e59d9b86d150758a8d1e66a37b34d4c4fc5f0fb76f43bc6d7e92d27f78dc69
pdf-font-stream PDF embedded font (sfnt) at offset 0x801E 10324 bytes