Malicious PDF — malware analysis report

Static analysis result for SHA-256 b10075f6fbc835d0…

MALICIOUS

PDF

65.6 KB Created: 2021-01-12 13:50:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 6d6bfb27ac7867b42944b5e3ead415f2 SHA-1: 729e7f94d43ddac5fa28b5b9d1ae6e68b6136df6 SHA-256: b10075f6fbc835d082fb9583d1beb3590214d6a1df02b83ee198b11f3d06ed96
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector and a link farm. The primary URL, https://traffking.ru/aws?utm_term=antepartum+haemorrhage+management+nice+guidelines, is flagged as malicious. The document's structure suggests it's designed to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?utm_term=antepartum+haemorrhage+management+nice+guidelines In PDF document text
    • https://cdn.sqhk.co/wufevinek/oajjG2n/33021927324.pdfIn PDF document text
    • https://kuxelozipapim.weebly.com/uploads/1/3/1/8/131871637/jadanetiso.pdfIn PDF document text
    • https://site-1178040.mozfiles.com/files/1178040/cariloha_bamboo_sheets_king.pdfIn PDF document text
    • https://nikibowo.weebly.com/uploads/1/3/4/3/134354591/4422715.pdfIn PDF document text
    • https://dozisinabi.weebly.com/uploads/1/3/4/6/134646642/wosisoju.pdfIn PDF document text
    • https://wuvirinofibugiz.weebly.com/uploads/1/3/1/0/131070402/df415b2.pdfIn PDF document text
    • https://gigerexug.weebly.com/uploads/1/3/5/3/135341911/62d3907c09b12.pdfIn PDF document text
    • https://site-1172855.mozfiles.com/files/1172855/approaches_of_management_information_system.pdfIn PDF document text
    • https://mixojokujize.weebly.com/uploads/1/3/4/3/134387696/wozaj_mapixum_gewosopuzuliw_nedek.pdfIn PDF document text
    • https://suzokapiwewop.weebly.com/uploads/1/3/4/3/134351383/3305534.pdfIn PDF document text
    • https://cdn.sqhk.co/gixejefi/jeOQjay/kumizibopilabibaragubu.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/sowewazulejewi/81934777881.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/tudadalatifukemi.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_off0000c2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D4 5476 bytes
SHA-256: 3266a491e95bb8ab01b5ac3a4d4002f2a9a203f8fdcca913cb346ee13a4042d0
font_01_sfnt_off0000d549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD549 10524 bytes
SHA-256: 13671edbed40f573f1e0e1dd55de0c7d8c929fc3b455b05fe313bf6d6e4bbb23

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