Malicious PDF — malware analysis report

Static analysis result for SHA-256 18c0ced9811babdb…

MALICIOUS

PDF

44.5 KB Created: 2020-08-21 06:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d07f8b18565bfd36a556a58156caf81b SHA-1: 4340f671cfb07dbe64ec29f741913ae5035596b0 SHA-256: 18c0ced9811babdbd827798628bba3936aa67a9d598538bb8b517b6d0d4e3482
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded links, many of which point to a redirector service designed to obscure the final destination. The primary malicious URL identified is ttraff.com, which is known to host malicious content. The document body, though heavily obfuscated, contains references to educational worksheets, likely serving as a lure.

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=first+grade+counting+worksheets+printable
    • http://wimaw.whitestonemv.com/uploads/1/3/0/8/130814328/1774154.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/0613/0337/files/22377616908.pdf
    • https://cdn.shopify.com/s/files/1/0465/5126/9526/files/city_building_games_apk_mod_offline.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/westinghouse_tv_manual.pdf
    • https://cdn.shopify.com/s/files/1/0447/4021/4940/files/ramuruwesomifakobet.pdf
    • https://cdn.shopify.com/s/files/1/0429/7742/7609/files/kidigixaput.pdf
    • https://cdn.shopify.com/s/files/1/0435/3110/8504/files/49611942116.pdf
    • https://cdn.shopify.com/s/files/1/0432/6080/5280/files/36769843131.pdf
    • https://cdn.shopify.com/s/files/1/0435/6728/4379/files/puxufufovigafudul.pdf
    • https://cdn.shopify.com/s/files/1/0434/3106/7813/files/96061164425.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_off0000694c.bin
c014ce8d05421ec44baea0fde37921b44b74862fa2cfcaf0e6d134edfd0f6ce1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x694C 5588 bytes
font_01_sfnt_off00007c48.bin
8ce7efe1ba2b81de898203350a3b360bd8700771eefe712cf21631d0d95e7a22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C48 12096 bytes

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