Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a71df71dc65c9b9…

MALICIOUS

PDF

62.7 KB Created: 2020-12-16 05:14:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0bcd47cad469e22281768bcbe566ed3c SHA-1: 1961d2c2d74f863bfc4b490e3e5c629b1848a1d4 SHA-256: 5a71df71dc65c9b9a10b2bc6fc4cd4ce3ca1646cf7669316b1afd1f5eb2dca5a
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ggtraff.ru, which is a strong indicator of phishing or malware distribution. The embedded content, though heavily obfuscated, suggests an attempt to disguise the malicious intent by presenting itself as a price guide. The ML classifier and ClamAV detection further support the malicious nature of this file.

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/123?utm_term=lego+movie+2+minifigures+price+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f8740f2992df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489041/normal_5fb2801cc23c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407316/normal_5fc7d314c23fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446399/normal_5fd2d436e8cd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5f8746318f077.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/5ac2d12e-415c-4d27-a3cb-591fc70c7316/kubotebomuxukivi.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/10250575466.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/troy_bilt_super_bronco_owners_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf1a7aaffad1251da81296/t/5fd70e3d89566e781f6663c8/1607929405390/7462858484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc187400-1f17-47c2-8dc5-e994c4d7028f/32119701053.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5073312facd59cec7706f/t/5fcce1695d2e6f3bda3c7d95/1607262572265/dirt_trapping_rugs_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/darebepugelek.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e01f2cf09257bd6be9c2/t/5fc3d7536457125654b16a30/1606670165024/quien_es_el_angel_de_jehova_jw.org.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/ncees_fe_reference_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe04b79b1ed03538a16a3b/1606288567456/gonasosuluramodexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57759ae2-6eec-45e1-9d92-40b57a369b01/20873751273.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b98b7e8d-4dbb-4c15-8aa3-d75bf5521b2a/ejercicios_de_decimales_para_primaria.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_off0000b765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB765 5368 bytes
SHA-256: 424778fac578142d2ea1ac023fb635d466c8496a5723bb4db66eb7998a086b08
font_01_sfnt_off0000c9ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9AD 10752 bytes
SHA-256: 785dff8f506645afeb7a4de303ea3b1a4ac55e119fb8671423e451bc4010c88e

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