Malicious PDF — malware analysis report

Static analysis result for SHA-256 e607f9b4851d646f…

MALICIOUS

PDF

43.9 KB Created: 2020-10-27 05:07:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 9db8b9eb077da19311860fa5ea8f3385 SHA-1: f944ca625ab4d21141bdd929f51b0a2fe2bd138a SHA-256: e607f9b4851d646ffc8c9de26db89861549b7998c36d3935920f126f552711b0
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, https://gettraff.ru/strik?keyword=iphone+4s+4g+capable, which is likely used to deliver a malicious payload or redirect to a phishing site. The document also contains a large number of embedded links, many pointing to benign PDFs, suggesting a link farm or SEO poisoning tactic to improve search engine ranking for malicious content. The ML classifier strongly indicated maliciousness.

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=iphone+4s+4g+capable In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413457/normal_5f976e26e1d7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372074/normal_5f8f0303dac9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382618/normal_5f960c973982d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369519/normal_5f8f3c1465fd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409840/normal_5f96d3c338b16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383582/normal_5f936f121de6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371498/normal_5f89b77e1db51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387031/normal_5f8ed15487541.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8064/6807/files/garrett_gta_350_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3444/2908/files/56880854560.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3362/3708/files/nustep_trs_4000_replacement_seat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8697/7441/files/magnus_chase_hammer_of_thor_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/the_canterville_ghost_summary_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/archery_basics.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/zevopisofenuj.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/sulilogobemowerimu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b545d39-bd45-4ee3-9607-7370ce3dc9d7/jakesatudavosakejifesuki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a502bfa-dd20-461f-80cf-5fde6dcee873/32530473001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b31b71e0-233c-49aa-aef7-c07ccf3db6fc/bazetenitubolajedotejil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecd766f8-a352-4ee4-be6a-da7bcd3d92ff/sivuwamijujepemokidex.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/76916570062.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/kemudovitilarikegakesimu.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/ametropia_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/37009297994.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_off00006cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDC 5264 bytes
SHA-256: f78fe11ffcf244a5d905c9528bce5210fe4de65fde52570af608a07b7c454adb
font_01_sfnt_off00007ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EBF 10560 bytes
SHA-256: 891ceb6288e7b9967f309292675fd009d661f49c1a8a47585accfd30ed6260b5

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