Malicious PDF — malware analysis report

Static analysis result for SHA-256 334087e41458043d…

MALICIOUS

PDF

73.7 KB Created: 2020-12-24 02:55:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 552fe89d8ac29f205a9a9cd20ef5e420 SHA-1: 1838d0f1ec1183a59735baefbaed925313c3fa35 SHA-256: 334087e41458043d44624a4514a064d99c1fedd1ab9cd03743c81016f87b10e8
214 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to known malicious redirectors or are part of a link farm designed to manipulate search engine results. The primary malicious URL identified is 'https://traffine.ru/123?utm_term=to+kill+a+mockingbird+worksheets'. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or redirection attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffine.ru/123?utm_term=to+kill+a+mockingbird+worksheets In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385230/normal_5fa18e0579edd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372960/normal_5f9a183db338e.pdfIn PDF document text
    • https://gutamunimidujad.weebly.com/uploads/1/3/4/6/134667749/3212881.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444874/normal_5fcf6a21cfd97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495039/normal_5fba33b25f44a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388629/normal_5fa8749c58497.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378831/normal_5f945159a4778.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f80ee16e-8190-4e52-9f8b-b040c536213e/victor_wooten_the_music_lesson.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/ncert_biology_book_class_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e52f3d36-314a-48d7-b7e1-5aa24b2fa468/wuworobipigafinebej.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/deferred_billing_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/tabla_de_alimentos_antioxidantes.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/angular_7_format_currency.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d2ccfd1-4bad-4473-aee8-98b349c90f06/15161652538.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/flight_of_the_bumblebee_saxophone_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d67cecc-95d4-4f23-bfaf-081f7c7cc055/silverado_brush_guard_winch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db777aec-353c-4780-9a06-98c54863f21a/binuzu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD690 5388 bytes
SHA-256: 10c3b7dc739ac4cc330a6bd2d5ece680c3e6c4bc48c19f6e3dda72d3b234abb4
font_01_sfnt_off0000e8ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BA 10172 bytes
SHA-256: 9e5c233deab74f3b46d93c08c8d959b732b839ff8300046f0127bf5b8e63ea54
font_02_sfnt_off00010b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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