Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dc68860cfe7cc0d…

MALICIOUS

PDF

69.5 KB Created: 2020-12-17 02:56:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 46a020e99d560259f10c42da2b4bc484 SHA-1: dc3d6ce3fed0d0e0c4380630c1c70f6132e42db1 SHA-256: 1dc68860cfe7cc0de4218a62c7d5a03cfe037f83b5588943d47203f69d3fe511
244 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. It contains a large number of links, including a critical redirector link to 'ggtraff.ru', suggesting an attempt to lead the user to malicious content. The presence of a link farm indicates a potential phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=exponent+in+word+shortcut In PDF document text
    • https://valekide.weebly.com/uploads/1/3/4/5/134584612/1176f25be2.pdfIn PDF document text
    • https://xowogibudul.weebly.com/uploads/1/3/4/4/134446034/zarudezelid.pdfIn PDF document text
    • https://tokenabasefegaw.weebly.com/uploads/1/3/3/9/133999291/882d96278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390996/normal_5f96377d55fe7.pdfIn PDF document text
    • https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/8ee4dbf09.pdfIn PDF document text
    • https://wefogazasu.weebly.com/uploads/1/3/4/8/134880183/pugasutupuxa-zemelup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374376/normal_5f93726958118.pdfIn PDF document text
    • https://ginadilu.weebly.com/uploads/1/3/4/7/134768391/tutuwetibesobuluxev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/word_definition_worksheet_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f3aad84-32cb-4bc3-bea5-bd1457005e67/weather_in_mediterranean_november.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40adeabd-00b2-465e-ad5a-b23e946fc40a/mitesibimafulepogukax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0be711c-9207-4a52-b75a-c75f9c027544/linea_vertical_y_horizontal_html.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78e33537-f3d1-410e-a0d6-9378cc588f6e/best_back_massager_for_sciatica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cae93ff3-1e87-4fa9-aac7-5306396c8654/elite_dangerous_keyboard_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6b29e81-d0cb-4bcd-9c1c-05fb01647cd4/batusawimegozijiror.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/ne_yo_movies_list.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_off0000d51a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51A 5036 bytes
SHA-256: db6d91f03caaf48482027142f1055579ba7c3b22cc2e926f54bab00fbec9bc9b
font_01_sfnt_off0000e653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE653 10156 bytes
SHA-256: c195ef62219796b7277085811fc585fe1740cd96fb641bc34476741b07ce6250

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