Malicious PDF — malware analysis report

Static analysis result for SHA-256 531fff2178bd1e28…

MALICIOUS

PDF

64.4 KB Created: 2020-11-18 02:41:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 91d575a91a98173e128073911503531e SHA-1: 42ae35601bfc9a9c483fbe047259e5be35390bee SHA-256: 531fff2178bd1e284cf5a16e425f3aabac79bc37f065c06cb0bf0787d2d67215
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://traffking.ru/123?utm_term=peel+and+stick+crown+molding+for+mirrors, is the primary indicator of malicious intent. While no scripts were extracted, the PDF structure and the redirector link strongly suggest a phishing or malware delivery attempt.

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://traffking.ru/123?utm_term=peel+and+stick+crown+molding+for+mirrors In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385235/normal_5f9be9192b2f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368500/normal_5f95cdb4ae1ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460694/normal_5fa9a4ff83755.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367635/normal_5f95655cb56b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381756/normal_5f9870da5bb1a.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/gotijejaj/vaniw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6044789-e238-48a7-8756-07e9c5385beb/82964922852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6be196d-a626-4454-99c9-0add6e70e049/gebenaxisezo.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/rojekesun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aed55588-9b34-4df1-b80b-6ca72f4b776d/childrens_express_care_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2254e52-00ed-4934-9d12-06b3f4f2c4f0/nys_court_officer_exam_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96f06bed-2a98-4d19-918c-e4277f636676/35360553627.pdfIn PDF document text
    • https://s3.amazonaws.com/fasotajedag/psych_5_rathus_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/moxalezumim.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_off0000bf0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF0A 5496 bytes
SHA-256: 1132b2c22234cf233c0e4a08e5a41f2b757b37bca8210d864ab07d333007b0fc
font_01_sfnt_off0000d1c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C0 10200 bytes
SHA-256: 788a02c4143cfc2861e797848460c49ff44768a67afc584704d2fa55074e1ac8

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