Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee74e8771fe4dfc…

MALICIOUS

PDF

69.4 KB Created: 2020-12-22 16:30:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: fef5f3518bff863d3262375183a7ec0f SHA-1: 26979771580491cde5fd43cad2fb956722fc7dc1 SHA-256: eee74e8771fe4dfc2fad8a8df6df94db31e7bc9a48d094bdb8384a090697ba5d
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a link farm with 24 external PDF links, including a redirector to 'gettraff.ru', suggesting an attempt to direct users to malicious infrastructure. The document body is heavily obfuscated, but the presence of embedded URLs and the heuristic firings strongly indicate a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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=adam+taurus+rwby+fanfiction In PDF document text
    • https://cdn-cms.f-static.net/uploads/4501993/normal_5fb8698598e8c.pdfIn PDF document text
    • https://ridixuzo.weebly.com/uploads/1/3/4/6/134605053/6952320.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/9b03ac0a-6972-4f74-a2da-4d7b07424616/dajorobomediwemikutibe.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/16899364833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a19e7ca5-02a7-4cad-84e5-df764e04be6c/23726721972.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6549e0c7-1bba-49a5-b5fe-be6c303ace6b/female_fronted_death_metal_bands.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03fd4cb3-3136-42f6-b4c8-1c6ee3af23f6/rabuwigiwano.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/frenzel_mcq_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcde5eec-3fc7-4416-91ac-d78d8a1881be/indian_nose_rings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f532ecf-a15f-4e67-8aef-1f48841b549b/abbyy_finereader_12_professional_crack_-_patch.exe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e93570ce-9f02-493a-9bc5-c249fee2e406/85513168529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e289d996-8f6a-433c-bc66-1058ceee3451/37136879324.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_off0000d306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD306 5460 bytes
SHA-256: 9cfa953fb7491dfade48fb87622e72ace998eaf34196533a1b5b7d41a5567263
font_01_sfnt_off0000e597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE597 10376 bytes
SHA-256: 5ae0e31bb90683cf3fcef046201b5c89f7553898999cc611b664f2b8f94930da

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