Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d9cdd9cee57c1e6…

MALICIOUS

PDF

37.6 KB Created: 2020-11-05 09:07:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: dd71661e8d4637ac41d3162e75d8efbb SHA-1: 97e1d1ebce5ac9216acbf8679fb6ff222cf699a6 SHA-256: 9d9cdd9cee57c1e60d0670d8fff9605a6a1092483ddb8d42007cc759ba4a7e8e
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting it is a manual for a Citizen eco-drive watch, likely a lure to encourage clicks on the embedded malicious links.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?keyword=citizen+eco-drive+watch+e820+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403539/normal_5f9279186a434.pdfIn PDF document text
    • https://baxelawinojiw.weebly.com/uploads/1/3/4/3/134333718/021c069c6edc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465386/normal_5fa2a6862193c.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/ed55e8a72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_5f89b3d0c9a81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384048/normal_5f930408eadf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375504/normal_5f9c9c8b08c42.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/jexijer/33221084300.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8421/0857/files/nimaluzinefefinuwijav.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/el_alma_y_el_cuerpo_letra.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/77965339874.pdfIn PDF document text
    • https://s3.amazonaws.com/tipakalif/51692039423.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/6_minutes_to_skinny_program.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/76766514607.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/16438097564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/6036/1899/files/guide_movie_songs_video.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_off0000513c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x513C 5608 bytes
SHA-256: 0296c7684458c65cc7e72eca4646b7c156253bcea0547f6e0343ce49ba578129
font_01_sfnt_off0000643c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x643C 10836 bytes
SHA-256: 53a2e4a9f6ebaa36e5e554a29f4ba14bb614012eb6083b7b1d7fbe5687930cd1

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