Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5176f891a0a5810…

MALICIOUS

PDF

85.7 KB Created: 2020-12-25 14:24:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ec09061be8b64e9b5351c1f322f87c24 SHA-1: 00332cfaf99f70171508d0bd0c1aa8e41cfa6a2c SHA-256: b5176f891a0a581055bc0cfcca3f6585aaf4f1d932d77c88313608f8a8abd0c0
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector infrastructure at `ggtraff.ru`. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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?utm_term=music+player+10+band+equalizer+apk In PDF document text
    • https://cdn.sqhk.co/bumadawab/xDgcRjg/93933985664.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f878e9883a1d.pdfIn PDF document text
    • https://ginadilu.weebly.com/uploads/1/3/4/7/134768391/2081501.pdfIn PDF document text
    • https://cdn.sqhk.co/wepaxuwelusu/hjjfEjd/89567331593.pdfIn PDF document text
    • https://dofufegudi.weebly.com/uploads/1/3/1/3/131381881/waxafobike-nelajuwemisidav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426424/normal_5fc826e964f9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478703/normal_5fa5bdc9cec4c.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/wonoti/69627492349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eab5e1b-36a3-41dc-943b-32e0028bdf39/vasopaposasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea9ed8b5-701f-453a-b5ce-4755c69adb2b/ciudad_de_las_bestias.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e066ca67-3bc6-40fd-95bd-4dc8bc0cbf10/basic_term_of_philippine_folk_dancing.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/8_point_compass_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/ledixigoja.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/59346844227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c8f6165-d01f-4298-a986-8d3794d065db/70711147914.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA27 5748 bytes
SHA-256: ba68645908cc282c4afbdf24cd09be711c0f5452b2d47d9d78e82bf0adf29fe2
font_01_sfnt_off0000eddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDC 10248 bytes
SHA-256: 9b3ade9d03ce0e3ca4a2f27840e0eeccece58a9d4641cc468081d383f042ba90
font_02_sfnt_off00010f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F7A 10760 bytes
SHA-256: 7ae21f21e1c4c860ceafc8f46dec72c5e327553432609d48c0b170a2e6b42c38
font_03_sfnt_off0001345c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1345C 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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