Malicious PDF — malware analysis report

Static analysis result for SHA-256 691b4f00567b7609…

MALICIOUS

PDF

68.9 KB Created: 2020-11-18 21:43:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a8107f5686fdc56079f02ac49a9f1984 SHA-1: 1a64de4969d1b8d23b8b9742308cf1b45eb6983e SHA-256: 691b4f00567b760911f46648d74c6680885993621f33a5e19f7bf95b8be1d69c
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://gettraff.ru/123?utm_term=dyna+glo+kerosene+heater+repair+manual'. This indicates the document's primary purpose is to lure the user to a potentially harmful external resource. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/123?utm_term=dyna+glo+kerosene+heater+repair+manual In 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/4bab89aa-d631-4ad0-abab-6370bfe3edaf/54906119917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/375fd7cf-9db4-4e06-939e-28be3eae077d/cross_cable_color.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/24675095382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc8dfa8d-eb35-40d7-90d7-cfbc366e6a13/soxiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daab29f8-72bf-4ee0-9ade-ccc0625e8182/40994550308.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/geometria_angulos_ejercicios.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/66580633074.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/nodosijodokipuvodurabefor.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/st_louis_county_property_tax_receipt.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/updated_asthma_guidelines_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/the_2017_bethesda_system_for_reporting_thyroid_cytopathology.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_off0000cfd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD0 5400 bytes
SHA-256: 49c1e593ee11fe83bf447166867ad4666bd205edd83ed8fc4fde9d59682cde44
font_01_sfnt_off0000e218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE218 10756 bytes
SHA-256: 534bc7c4e469d97d589a6bfdb303a8dda26518af14fe1fb133ed3c3ea064621c