Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6680aa535b8aa2c…

MALICIOUS

PDF

42.6 KB Created: 2020-10-11 21:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4dc2892449df1ca79fdec61544cf1d0d SHA-1: 195e25d54c90d4f600d641343f2d269772839294 SHA-256: e6680aa535b8aa2cc6a4346ac1412589d9630baf44b1e4d5d7a98a828c3cc9c1
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://ttraff.link/pify?keyword=centos+7+pdftk In PDF document text
    • https://site-1036693.mozfiles.com/files/1036693/75992820279.pdfIn PDF document text
    • https://site-1036695.mozfiles.com/files/1036695/49269903363.pdfIn PDF document text
    • https://site-1044113.mozfiles.com/files/1044113/68025444687.pdfIn PDF document text
    • https://site-1043884.mozfiles.com/files/1043884/29567088264.pdfIn PDF document text
    • https://site-1040242.mozfiles.com/files/1040242/38891383183.pdfIn PDF document text
    • https://site-1036886.mozfiles.com/files/1036886/rukiborusunu.pdfIn PDF document text
    • https://site-1043090.mozfiles.com/files/1043090/zokipabedowezuxugamotuxom.pdfIn PDF document text
    • https://site-1040987.mozfiles.com/files/1040987/mojireguwiwapoporilobanof.pdfIn PDF document text
    • https://site-1038357.mozfiles.com/files/1038357/rafasupu.pdfIn PDF document text
    • https://site-1041184.mozfiles.com/files/1041184/26433519871.pdfIn PDF document text
    • http://files.ballparkapparel.com/uploads/1/3/0/9/130969984/7f0b5cb2cdb9.pdfIn PDF document text
    • http://bemetigi.thenorthwestblogger.co.uk/uploads/1/3/1/0/131070993/sasupifu.pdfIn PDF document text
    • http://gilog.pathofselfdiscovery.com/uploads/1/3/1/4/131437615/5a24b5e6b0e34.pdfIn PDF document text
    • http://ganuxozo.actsofstjohn.org/uploads/1/3/1/4/131438580/8797852.pdfIn PDF document text
    • http://datemixe.dbehrends.com/uploads/1/3/1/3/131378776/vifanob.pdfIn PDF document text
    • http://divaz.rabiamalik.net/uploads/1/3/2/7/132740478/kalaxedes.pdfIn PDF document text
    • http://files.annreillynaturalhealing.com/uploads/1/3/0/7/130739934/xamoje.pdfIn PDF document text
    • http://files.bakedwithhearts.com/uploads/1/3/0/7/130775968/8148977fd5d5e.pdfIn PDF document text
    • http://safuwenup.sunriseandpinedesign.com/uploads/1/3/1/4/131453133/subigewi_javaxebe_tijamum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00006924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6924 4744 bytes
SHA-256: 396c54fbd7b0bfe9084a7e14ad25459d96842450e92fa2be308c4757ae12d608
font_01_sfnt_off0000796e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x796E 10644 bytes
SHA-256: caac04435130df83fd4b5e10161deb4e75e89b8a4e4299feb89d815663ed665e

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