Malicious PDF — malware analysis report

Static analysis result for SHA-256 1802ede99a8ec94b…

MALICIOUS

PDF

41.0 KB Created: 2020-08-14 14:28:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b5c4b16937df994b2c907ed2f79a3f7 SHA-1: c835c4083e92fa3d430ed795f90eb7e69b26439c SHA-256: 1802ede99a8ec94b78727f8c63c3a9fd69f05b329af1325a30289e14166c7beb
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains the primary malicious URL, suggesting a lure to external content.

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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=ionic+bonding+worksheet
    • http://files.journeyliving.org/uploads/1/3/2/6/132683267/3017789.pdf
    • http://files.studioeightsalonandspa.com/uploads/1/3/2/6/132695620/wosemuvomijilatob.pdf
    • http://jivumi.wholearmorministry.com/uploads/1/3/0/7/130738962/5e887cd4a0.pdf
    • http://files.missrodeowyoming.com/uploads/1/3/1/3/131383342/2ad3a51565.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/6686/0455/files/46089206510.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1365/files/goanimate4schools_comedy_world_character_creator.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/kizobomaxavabikum.pdf
    • https://cdn.shopify.com/s/files/1/0435/0722/0635/files/fusionner_2_fichier_avec_creator.pdf
    • https://cdn.shopify.com/s/files/1/0432/9350/7737/files/fajumelob.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2420/files/nemewalitikorosajigapilum.pdf
    • https://cdn.shopify.com/s/files/1/0432/4727/2098/files/worksheet_english_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0431/6010/9210/files/wget_ignore_robots_txt.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/lilenis.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_off0000627c.bin
6349fb2cc28daa8f2bbbbce45a9b0e12f4499e1658fe41b69ca923f0fb916853		 pdf-font-stream PDF embedded font (sfnt) at offset 0x627C 5192 bytes
font_01_sfnt_off0000742e.bin
dc13f217c9a8a83b47f674a8416fed43df5079313da53fe00119e52977a3be3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x742E 10328 bytes

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