Malicious PDF — malware analysis report

Static analysis result for SHA-256 07c86aadfeb21c06…

MALICIOUS

PDF

43.3 KB Created: 2020-11-05 21:43:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07776f2b78bfa0f682447348cb4a3d58 SHA-1: 99679619de87e0ac91b872c6c0da145a8b47ddcb SHA-256: 07c86aadfeb21c06ff44e602899a2bbc885db38957219cb6cdcf01faec1eb50c
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector's target. The presence of numerous external PDF links suggests a link farm designed to obscure the true malicious destination.

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://traffmen.ru/123?keyword=code+org+answer+key+lesson+8
    • https://cdn-cms.f-static.net/uploads/4410954/normal_5fa217427c891.pdf
    • https://cdn-cms.f-static.net/uploads/4381752/normal_5f8b46a57760e.pdf
    • https://cdn-cms.f-static.net/uploads/4369525/normal_5f891b51a1ace.pdf
    • https://suludizivot.weebly.com/uploads/1/3/1/3/131383823/fulur_vitoz_gususizedamiliz.pdf
    • https://tijujuvuxerupuz.weebly.com/uploads/1/3/4/2/134236121/9533300.pdf
    • https://cdn-cms.f-static.net/uploads/4382780/normal_5f8c48db144f9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cf1a44c6-c4ea-402d-bcf7-6c3ccd0f3cd6/71614574490.pdf
    • https://uploads.strikinglycdn.com/files/f7a6f011-5c6b-44d3-9ade-3a12122c1014/red_cross_login_saba.pdf
    • https://cdn.shopify.com/s/files/1/0437/0087/9515/files/forerunner_235_manual.pdf
    • https://uploads.strikinglycdn.com/files/db248a2f-0d88-470b-9a6d-098d167a1fe3/xugolodezaxomadusi.pdf
    • https://uploads.strikinglycdn.com/files/6c895b0f-4de2-4e25-b6f7-0ef24e35c3a5/woladamejulomifow.pdf
    • https://uploads.strikinglycdn.com/files/e4bec335-e273-49bc-924a-950acdedd123/dorr_elementary_michigan.pdf
    • https://uploads.strikinglycdn.com/files/40cbda08-5627-4e9c-8314-c1e5316ffb51/48764124768.pdf
    • https://cdn.shopify.com/s/files/1/0481/7698/8309/files/dirij.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_off000069a9.bin
f9bc8a7669f9f219401ec439704117b13cb2fe7dd2e5582b03be0141f5ff6442
pdf-font-stream PDF embedded font (sfnt) at offset 0x69A9 5348 bytes
font_01_sfnt_off00007bf8.bin
813f257c7aa9324bfcf6b42a2be25fb148cc435f7367d41dd0bf648c9f8ef1a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF8 10688 bytes