Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa29741e2e355f51…

MALICIOUS

PDF

63.0 KB Created: 2020-12-20 03:20:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 0f3c3393a9268bf495b959600f19863c SHA-1: 744d5191a4aecccb937aa7f02ff179b048c9fa97 SHA-256: aa29741e2e355f512f3a8c3b4e141aed8b6470e990af824b31dff1f12e29bca1
244 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. It contains a large number of external links, suggesting it functions as a link farm. The primary URL identified, 'https://traffking.ru/strik?utm_term=woodland+hills+elementary+eagan+mn', indicates a potential phishing or scam lure, possibly disguised as information related to the specified elementary school. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/strik?utm_term=woodland+hills+elementary+eagan+mn In PDF document text
    • https://cdn-cms.f-static.net/uploads/4449766/normal_5fa33dd7ce6fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368788/normal_5f8807e6f1e94.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/pivejamu-bariwiroj-jobavurujuzun-kewezofewitimob.pdfIn PDF document text
    • https://tonulolini.weebly.com/uploads/1/3/4/3/134341491/verir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382201/normal_5fae241091b6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467278/normal_5fde3850b09f1.pdfIn PDF document text
    • https://mutakisutuw.weebly.com/uploads/1/3/4/7/134768563/logafer_nipopezifuko_pogugisixijerij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476767/normal_5fc812dbda484.pdfIn PDF document text
    • https://xugilatopuke.weebly.com/uploads/1/3/4/7/134746985/9ecf1.pdfIn PDF document text
    • https://pibazafefudo.weebly.com/uploads/1/3/0/7/130776509/6384349.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6cbd267e-86d7-4239-b1f9-3d8a4d8949fe/lazeburinumedi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dff6692-4873-4d6a-9952-d47d23e44f9b/you_squared_price_pritchett_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b482c5c4-8788-4320-a73a-feaa3096c392/libros_sobre_alimentos_transgenicos.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF0B 5140 bytes
SHA-256: 2305a409a73968eb73b3937ed97f404059051b80844eb9233ec8df8774816bc6
font_01_sfnt_off0000c05d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC05D 9444 bytes
SHA-256: 2fce8fdf3275f418fe99879b39d6be232c0263722587b7230986ec7d00325f66
font_02_sfnt_off0000e07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07D 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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