Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec39d15ebe905bc4…

MALICIOUS

PDF

77.2 KB Created: 2020-11-14 20:19:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f538413a1cbda91b3f721c0d7a67a1f2 SHA-1: b032e94a5268558dbafc3146b87ab997392a4a2a SHA-256: ec39d15ebe905bc484d2bc95008bf17f4736f3502011c3faef20f820110d1f1f
154 Risk Score

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 URL is likely used to redirect users to a malicious site, potentially for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL within the document body suggests an attempt to trick the user into clicking it, aligning with a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=android+app+acestream+links In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421966/normal_5fa70f1061bcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406169/normal_5fa715d526717.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460072/normal_5faf8bdacc41f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478438/normal_5faa126005a18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413585/normal_5f9681aea846a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461485/normal_5fa946dd8e716.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390374/normal_5fa0f9d398acb.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/9ab44c2d-0971-4fa1-a338-7f62c1f0530d/dungeons_and_dragons_character_sheet_google_docs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3569a5f4-2c7c-42cd-a1bb-81e01dcc9d18/why_was_hubba_bubba_squeeze_pop_discontinued.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec63f68e-25e5-49c3-bdba-bdc1617dd37e/9799965524.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c835e8f2-1be0-43db-8191-52b3c78dc96c/clash_of_clans_hileli_apk_cepde.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbbb11cb-5260-4814-b5c3-22a261a2b1c1/capitalization_worksheets_2nd_gr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67b7b5fa-09bd-4eb8-9715-4e9e59227769/nupipilazukuguzibuxebi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ca4b60d-59c2-4f75-9223-ed95be9b1233/36354106446.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_off0000efd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD7 5272 bytes
SHA-256: 01b870d9c08972cbbc695000e629d52be14b9cf877d26d43a35d7dcaec9b8a81
font_01_sfnt_off000101ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AD 11304 bytes
SHA-256: a803ba909cd7a3e5d3edc610fd4673a07b3a5193f70ac4889219cc7b17755e3e

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