Malicious PDF — malware analysis report

Static analysis result for SHA-256 7401ff527350cce5…

MALICIOUS

PDF

79.2 KB Created: 2020-11-10 22:19:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9625c22df64b427c191df6b74bf978cd SHA-1: d2a5d67c8d7f9f5602b3671ada12a0364c693bb8 SHA-256: 7401ff527350cce50b2418c2f5af9dc5c7ef60b85b7ad1bb2191c329c15eed9e
234 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous embedded links, a significant number of which point to a link farm designed to redirect users to malicious sites. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to 'ggtraff.ru', indicating a phishing or malware distribution attempt. The 'PDF_SEO_LINK_FARM' heuristic further supports this by identifying a large number of external PDF links, suggesting an effort to manipulate search engine results or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://ggtraff.ru/strik?keyword=town+of+boonton+zip+code In PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/pejixijesoba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367912/normal_5f919e30f05e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448343/normal_5fa7147ce3622.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373505/normal_5f9b6a8b3de76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387408/normal_5f8e084717707.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad828adc-d4d9-4651-ac67-9d983ea05bad/great_american_eclipse_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/46054143889.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/desasapesulefirus.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/veserivelu.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/79930116952.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/886630ef-63be-466a-9f18-45e14e853271/tu_jab_jab_mujhko_pukare_song_download.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF02 13372 bytes
SHA-256: 15e5085e7ed5910e4c3be9918a60e943c1f66ee4b11d0abd33aa0134a5b7c5c1
font_01_sfnt_off0000f9f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F1 4864 bytes
SHA-256: 8f5f3251e5e8c2e3f6e5c7e7b1ac5b87bc850fef189120792cf9e7176ba591c3
font_02_sfnt_off00010aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAE 11308 bytes
SHA-256: 27193c1f4f1f8de5c046ed2e8c2269bd50493238cfb33da1af739bacc815a85d

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