Malicious PDF — malware analysis report

Static analysis result for SHA-256 31603131ea2096ec…

MALICIOUS

PDF

73.2 KB Created: 2020-12-27 15:59:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b7296c511b2d28ef32234efe1380d797 SHA-1: e046fd7554259fcfc7dbc2f4d2e5492112ebd1bd SHA-256: 31603131ea2096ec968e37c213279ef91bd1e32bd4341b7c19a11bba77d14335
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is indicative of phishing or malware distribution campaigns. The ML classifier and ClamAV detection strongly support the malicious nature of this file. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, likely leveraging a vulnerability or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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=boney+m+christmas+video+songs+free In PDF document text
    • https://cdn.sqhk.co/siwemawatu/EidRvSS/lock_screen_rotation_on_iphone_8_plus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465703/normal_5fb2e28d4828d.pdfIn PDF document text
    • https://cdn.sqhk.co/nibedogoxov/Ajbiihh/degekitese.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427780/normal_5fd8cbbcbddfc.pdfIn PDF document text
    • https://cdn.sqhk.co/nazopekujavi/lhgjdmR/flipkart_stock_chart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377114/normal_5fbbae050c39b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471275/normal_5fbdf3713b804.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446492/normal_5fabfacbd6273.pdfIn PDF document text
    • https://cdn.sqhk.co/vizinifum/hiScigR/degonizoxutifiwidawoxavem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464077/normal_5fe03aec0589e.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/aYhjhfN/slot_racing_track_for_sale.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC04 5612 bytes
SHA-256: 2cfd0b278ab74e4b8f075aceed75d9b7001090494649a3cc2e795ab0796fb90b
font_01_sfnt_off0000df06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF06 10336 bytes
SHA-256: 88a0ba619710d69b3c2533a5c7dfdfe94f6d33b7fbb295058a79c3b1fdc9ecb7
font_02_sfnt_off0001026e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026E 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660

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