Malicious PDF — malware analysis report

Static analysis result for SHA-256 07401a8919e631da…

MALICIOUS

PDF

66.9 KB Created: 2020-10-27 08:20:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 15e434deab021ea6aea8d89f7f394fa9 SHA-1: 5ffa747fbdee507989374dbc0d36ee1127a7e9be SHA-256: 07401a8919e631dadf44a6021337c81823cff4c3eea503d2bbe19ef64a5f4d02
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector and a link farm. The primary redirector URL, 'https://ggtraff.ru/strik?keyword=microeconomics+is+concerned+with+issues+such+as', is designed to lead users to potentially harmful content. The presence of many links to external PDFs, including those hosted on Weebly and AWS, suggests an attempt to obscure the final malicious destination and potentially engage in SEO manipulation for malicious purposes.

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://ggtraff.ru/strik?keyword=microeconomics+is+concerned+with+issues+such+as In PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/kamoradonume-kedimexivojofuv-jubuxogugu.pdfIn PDF document text
    • https://vukijimox.weebly.com/uploads/1/3/4/3/134358494/muvom.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/morawunut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413110/normal_5f97892e0a2c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389084/normal_5f8ee8a9bd20a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370777/normal_5f8aa99d1c9d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373776/normal_5f95c10fe5222.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419644/normal_5f97afd48723a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379362/normal_5f930c383c564.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383804/normal_5f9712e3c2fab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f871a670ad3f.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/nawosineromigi/lifunenovukojosumogaluno.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/classical_economic_theory_and_keynesian_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/ada_diabetes_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/lobamegoka.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/dediwodeguvotasarejoj.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/blackbird_beatles_guitar.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/kurtulu_savanda_cepheler_konu_anlatm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4de326a1-765e-4bfa-aed7-ce06d062a6b7/93415055796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e4bc208-8792-4120-9ee9-fd6e11559838/cb550_wiring_diagram.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_off0000c460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC460 5244 bytes
SHA-256: 6d81f9e6bada009afc8b14c4c1f083fc923f73671340fe2972093d25c8ea9011
font_01_sfnt_off0000d619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD619 11952 bytes
SHA-256: e964d9845f33c75d6796a7c6aa1b93c45f957f2878741fea7a1ce55f382281ad

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