Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ff654198f25356b…

MALICIOUS

PDF

39.9 KB Created: 2020-10-14 05:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5dd315abf8c1cf7422446b49210ae990 SHA-1: 8829804441c7848f338c70363c0a6758545d1aac SHA-256: 6ff654198f25356b3f3fedea4bbad49e97a2161b7c01ad4d96efc6c2fff1cb46
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits malicious behavior by acting as a link farm, directing users to a known malicious redirector. The PDF contains a large number of embedded links, many of which point to external PDF files hosted on strikinglycdn.com, and one ultimately leads to the malicious domain gettraff.ru. This suggests an attempt to distribute malicious content or phish for information through a network of linked resources.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://gettraff.ru/strik?keyword=iso+9001+self+assessment+checklist+pdf In PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nimemoroligamaj-tafixidupara.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/lixavej_rivutavipulox_vunezikavad_lirumonoguwako.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/batagebexi.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/4056517.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/zanadutut_wexudafenatogun_jetomefoja.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/4bd81ed8-dc60-47c9-a9e6-8709ee3384d0/vozurebomexajidavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce0ac25c-ce2d-4e60-918e-0a05d3089399/14565278173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36018907-c5f2-4e7a-8d7f-b29b7e708f37/doxofere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/799cfea5-d06e-425c-b5de-8358e951e154/jogugezizapugisevis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b8fec72-aed5-4439-b9dd-a2305721beed/52221861601.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e95ee3d-9baa-4cb2-b9f7-49daa0e39963/kasuwukasifuvebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ac7e942-1ea0-4b83-842d-d2cbab58b274/10033966017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01a39cac-4039-4e2b-973b-f6b88aa6306a/dozitewunevujerod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/859669d4-e336-449b-b360-5edaf2e648f6/juwewamejirix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a195a71d-8761-4745-bc6f-6afcdb3806e3/49227093833.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_off00005f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F35 5648 bytes
SHA-256: 5aca43e2ed435fc2706d58f3ded3b7abef1c017b7cf00ee7fff9bb825424a460
font_01_sfnt_off00007240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7240 9488 bytes
SHA-256: 16c03033086160b64bcfd696b9e2046aa9666ac03147237147760b3b651fa037

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