Malicious PDF — malware analysis report

Static analysis result for SHA-256 95dbe18c867d605c…

MALICIOUS

PDF

65.8 KB Created: 2020-11-10 07:49:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3caa221c7fcce581c46a0bc5a6b4b716 SHA-1: 1dc6201c385c76d72d1a9555540feda3cb93e92b SHA-256: 95dbe18c867d605c92504c6f0469b4d3e3f53ba4c1cc488bb9b8ca5e3225ae27
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. This indicates the document is designed to lure users to a malicious site. The presence of numerous other PDF links, many pointing to benign-looking documents, suggests a link farm or SEO poisoning tactic to obscure the malicious intent. While no scripts were explicitly extracted, the PDF structure and malicious link strongly suggest a phishing or malware distribution attempt.

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://ggtraff.ru/strik?keyword=predator+and+prey+relationships+in+the+desert In PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/cb0a75df4b.pdfIn PDF document text
    • https://zamomojufowa.weebly.com/uploads/1/3/4/6/134613680/gotovejaba.pdfIn PDF document text
    • https://fumubesoxumus.weebly.com/uploads/1/3/4/4/134485348/gupoxekesofilabemid.pdfIn PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/9792872.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/8098586.pdfIn PDF document text
    • https://xozukogazi.weebly.com/uploads/1/3/4/3/134371147/45eabdda8c.pdfIn PDF document text
    • https://wekexodaxax.weebly.com/uploads/1/3/4/7/134713384/7768005.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/libowebujakux/74141883241.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/what_are_the_four_attachment_styles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ea12d67-0453-4353-888b-9ad2165b533b/19242100607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4d5c3fa-d7e8-43cb-b3ac-6719a53eb3d0/directions_to_fort_lauderdale_airport.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/fumukiwozovuvubaguriju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68b2dc26-d2da-49de-b25f-c6bded650647/manual_foot_powered_washing_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/35168429908.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_off0000c625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC625 5152 bytes
SHA-256: d596828a2c1cb9e97e6daf54ba4cd4b837d6d3283da987067291c5fb9a98b19d
font_01_sfnt_off0000d7a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A6 10172 bytes
SHA-256: 8270d8c236951fe2831f1bd1bb314891bab770fcbe972d17fe0981cc2aeadb3d

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