Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ea0f3dc2ee870cc…

MALICIOUS

PDF

47.7 KB Created: 2020-10-28 17:01:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ad89e97caf202a55c356358aef52f6d3 SHA-1: 3c4ed7a5cebf235e936874b71967a036365bc909 SHA-256: 8ea0f3dc2ee870cc616dcd04be839695d22bae85f7442657df3440f4c3a28847
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link to a known malicious redirector, disguised as a treadmill manual. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic firings indicate an attempt to redirect the user to malicious infrastructure, likely for phishing or malware delivery.

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://gettraff.ru/strik?keyword=proform+space+saver+580+si+treadmill+manual In PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/8e398326d8b96b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380530/normal_5f8e7823d70c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_5f9756e8b1a40.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/4009446.pdfIn PDF document text
    • https://mejefarekobuk.weebly.com/uploads/1/3/4/3/134338461/pupevevopela_bavemefine_jivevet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406455/normal_5f98c4b1bad91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386091/normal_5f8d439b9d208.pdfIn PDF document text
    • https://zewubonorow.weebly.com/uploads/1/3/1/3/131398185/gotupubi_zorerubem_ligoduvedozi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390324/normal_5f959594309a9.pdfIn PDF document text
    • https://kulilopoxi.weebly.com/uploads/1/3/4/3/134375859/bd93c7ab457d7ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4246/4166/files/75729623178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5302/1334/files/classification_of_living_things_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/xojabupigenowibogon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3134/3516/files/jotabatebof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/87579962328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1094/8254/files/xfinity_high_definition_channel_lineup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6795/6121/files/the_knights_sword_quest_guide_2007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8637/1752/files/94686167944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8576/7850/files/22383401732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4791/9007/files/jadiki.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/quartic_equation_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/rujezaseruke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3654/3656/files/50389909017.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5938 5820 bytes
SHA-256: b54c62801f0a4ad1fa37bedb43651e627b38fd51b1191901f37a686737da18e0
font_01_sfnt_off00006cfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFE 10644 bytes
SHA-256: 10e8f4638c84f81b5d98226c20c0a62d4ae29c08be314b00d28e4c3107aebe06
font_02_sfnt_off0000914d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x914D 18964 bytes
SHA-256: 00059ffa3c2b2f9afe3630d6a991aac9658347da0c71dc63cf9c2877b764c2a0

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