Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e783c7260f20ff…

MALICIOUS

PDF

84.5 KB Created: 2020-12-28 03:58:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 56f48f11938386241ad9f6cbd6ba5fbd SHA-1: 8b2e289121c3c252952265e524e38e319533d9f4 SHA-256: d2e783c7260f20ffb35c45ea7f3080b8d454e8628f82da7b7adef11f2591d583
214 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a redirector link and a link farm. The embedded URLs, particularly 'ggtraff.ru', suggest an attempt to redirect users to malicious sites, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and the presence of numerous external links indicate a malicious intent to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/123?utm_term=momentum+conservation+in+explosions+worksheet+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4500887/normal_5fe64d1b9bb75.pdfIn PDF document text
    • https://xulajaxosu.weebly.com/uploads/1/3/4/3/134366267/kowipojeraluzox.pdfIn PDF document text
    • https://gixisisopovi.weebly.com/uploads/1/3/4/7/134713576/timuxofez-xenam-fixepopibe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411479/normal_5fd1e3cc15946.pdfIn PDF document text
    • https://warajepij.weebly.com/uploads/1/3/4/6/134608856/594161.pdfIn PDF document text
    • https://resuzomesidi.weebly.com/uploads/1/3/4/7/134746605/pelekuxanaluzu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f87195a2d597.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5fa3ee57a511c.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/0221e936-53e1-44d1-b2e4-ad6354ad0d25/64068500314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/077263d3-e260-46c6-934a-0ed87751e2c3/i_love_the_mountains_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27ad7ac4-11ed-47e6-9e8a-0674c42ec53e/kefetibenugevujew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcc02ecc-f0f5-4c2e-b378-bc84fe4a9022/sivumuvara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd3c7558-0976-4a20-8906-22bce4d04658/56799153780.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001048e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048E 5464 bytes
SHA-256: 19d757f064c9f16f33190ba0d01c8e99d503121780982fe5064ba31ec3ba6eea
font_01_sfnt_off00011717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11717 16260 bytes
SHA-256: 5f1e6d8bfb4bb4021804acfc132d24ecf4b6a20e0ac273ebf0d8901561f5d6d8

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