Malicious PDF — malware analysis report

Static analysis result for SHA-256 75edd506b2a7f55a…

MALICIOUS

PDF

69.4 KB Created: 2021-01-11 01:56:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d306aad4fea000c7a32867e0c777d7d5 SHA-1: 75975ca67974792e25e333c01c199602dfbd0848 SHA-256: 75edd506b2a7f55ad40aa3f956c68ef353ad0a625558d31b4aa3ea3ae20df146
244 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to disposable hosting services like Weebly and Mozfiles, forming a link farm. One of the links, 'ggtraff.ru', is known to host malicious redirectors. This suggests the document is designed to lure users to malicious websites, likely for phishing or scam purposes. No scripts were extracted, but the link farm and redirector activity are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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/aws?utm_term=amenitee+template+tool+instructions In PDF document text
    • https://vakenufepuxino.weebly.com/uploads/1/3/4/5/134529081/7b50701a6d51d42.pdfIn PDF document text
    • https://salovunuwav.weebly.com/uploads/1/3/0/9/130969923/eb1c805b4db26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450728/normal_5fc0cf864352e.pdfIn PDF document text
    • https://tujilebofali.weebly.com/uploads/1/3/5/3/135398949/satoriwubi-debarojutovozij-zufam-lalidaxolodi.pdfIn PDF document text
    • https://site-1168115.mozfiles.com/files/1168115/gajas.pdfIn PDF document text
    • https://site-1168274.mozfiles.com/files/1168274/39880336640.pdfIn PDF document text
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/6741250.pdfIn PDF document text
    • https://site-1176856.mozfiles.com/files/1176856/light_up_christmas_jumper_2019.pdfIn PDF document text
    • https://site-1168414.mozfiles.com/files/1168414/62156218058.pdfIn PDF document text
    • https://xitukuwelup.weebly.com/uploads/1/3/4/3/134340625/7007845.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476427/normal_5faea896f3bee.pdfIn PDF document text
    • https://site-1172512.mozfiles.com/files/1172512/24683572322.pdfIn PDF document text
    • https://sajipetifejej.weebly.com/uploads/1/3/4/8/134883768/9024434.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/kavitokolezub/mead_direct_response.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/aircraft_maintenance_engineer_cv_template.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_off0000d5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D3 5068 bytes
SHA-256: 91006e08ea252e2d2487e955dea0df4c5edbca50493f8e629096b22a8fc200c8
font_01_sfnt_off0000e6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F5 9900 bytes
SHA-256: 3b55145887f4e1779f54f4e4cb4e6b18a46c507fd4e4735a7eb8d86c0dfec0f5

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