Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed6473348f994a50…

MALICIOUS

PDF

82.0 KB Created: 2020-10-26 21:56:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: fe2c484a2052fdc7fa61c7fa50a8117c SHA-1: 15a33075f0c65363725ffaccea5e7eeaf3e29d68 SHA-256: ed6473348f994a50f419c328d91fc2479a58b9bebeaf2e1e1e31871a6cfba671
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to manipulate search engine results, likely to distribute malware or conduct phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://cctraff.ru/strik?keyword=washburn+rural+high+school+graduation+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368745/normal_5f8d528043ace.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410956/normal_5f94311b87295.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384152/normal_5f8bf20e43dc0.pdfIn PDF document text
    • https://lurukise.weebly.com/uploads/1/3/4/4/134454795/nolutifej.pdfIn PDF document text
    • https://xisubuto.weebly.com/uploads/1/3/1/3/131380177/5280501.pdfIn PDF document text
    • https://foduzivanikatik.weebly.com/uploads/1/3/4/4/134492938/4780267.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f94e89d02a27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f918226424ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_5f86fe930552b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382790/normal_5f8f337c1b658.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376086/normal_5f8988f655e0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367297/normal_5f958038b05bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406228/normal_5f952066ecc77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5f874db7f08f3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1966/3522/files/riwuwunawalexijemamiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2815/1959/files/download_pokemon_games_for_ppsspp_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/0312/4375/files/devil_may_cry_4_final_boss_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8521/5940/files/send_fax_through_android_phone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1758/2230/files/58628318418.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8e0be4e-b7ec-4d7d-b664-7a2ec1a3646c/80244815992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/944db291-63da-405f-9f79-b17534426595/83454420169.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC293 3136 bytes
SHA-256: 6487091c0070741e646db4a1cda49bb5dd8928231115cd9838b724a369c8679e
font_01_sfnt_off0000cdbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBE 5392 bytes
SHA-256: bfac639f6957f359263123e1c13138d3ec1f44b74fac920498d6f37389a7b72f
font_02_sfnt_off0000dff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF8 3464 bytes
SHA-256: 2e6280e5c88886dee9901e90b5b3ba056223b77a145f2cb6078448a998bbb660
font_03_sfnt_off0000edec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEC 11380 bytes
SHA-256: 9b5e4f19d0826a2a4381ebaee7d248d682e376375769fff3655c9af0e334c696
font_04_sfnt_off000114f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F2 16300 bytes
SHA-256: eaf97412a8be0d30554d53fe2723bb586a50a198092d00e274d496a140f68995
font_05_sfnt_off00012a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A67 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e