Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c97a38491594ccb…

MALICIOUS

PDF

73.8 KB Created: 2020-12-24 22:06:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c8021882fe389ea670bc9a1c04307d75 SHA-1: ec8bfd3e9dab9fac837b194f9023d2da60394f61 SHA-256: 6c97a38491594ccbd128dbddb076bb4aee57f5fbbe12ed41fad92a9b7c5759de
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains heuristics indicating it is a malicious redirector and a link farm hosted on disposable infrastructure, specifically targeting users with lures related to invoices or payment requests. The embedded URL `https://ggtraff.ru/aws?utm_term=excel+sheet+format+for+gst+return` is identified as a known malicious redirector, suggesting the document's primary purpose is to lead the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and malicious link firings strongly suggest an exploit or redirection workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=excel+sheet+format+for+gst+return In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393359/normal_5f9c02284ffd5.pdfIn PDF document text
    • https://nifufoji.weebly.com/uploads/1/3/4/4/134458522/xanup-vabelinolo.pdfIn PDF document text
    • https://patipuvilinuw.weebly.com/uploads/1/3/4/4/134487218/2e46ae27de.pdfIn PDF document text
    • https://zezevibowavaki.weebly.com/uploads/1/3/4/8/134854125/dolimaledadeserexi.pdfIn PDF document text
    • https://kefelewupu.weebly.com/uploads/1/3/4/7/134711224/7858960.pdfIn PDF document text
    • https://vezorobabuwej.weebly.com/uploads/1/3/0/9/130969079/7df480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382197/normal_5f9444d6380cc.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/47dd3981-74ba-4260-b0f1-048430184539/ejemplos_de_tesis_de_gastronomia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/038fe45a-315b-4dbb-9e1e-96f0a54e3e49/85390507707.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/40378206264.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/hot_wheels_wall_track_starter_set.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fda76a46-87e9-457f-8fdc-b8a3b828b871/86499336146.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/how_navy_seals_plan_lead_and_learn.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_off0000e444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE444 5320 bytes
SHA-256: bec20b704ad386f859cb902ca137a46c27360a8a23e81e802d09bebb09011b2f
font_01_sfnt_off0000f63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63B 10732 bytes
SHA-256: a4c5e2381660a3605db278123d0df4965065fea259a269ec00933dadfedc5ac7

Open this report in the interactive analyzer, or submit your own file for analysis.