Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dcf6270e2a9719f…

MALICIOUS

PDF

40.3 KB Created: 2020-10-28 05:20:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f47ac2ef8d93234e4d0111d7859a27e6 SHA-1: 4327ed10bc030e789982e1c73e7a8a881a19a197 SHA-256: 2dcf6270e2a9719fd4942174feaec4eb9342ec33d8d9e6e2ea3e22c0ee279f38
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The heuristic PDF_SEO_LINK_FARM suggests this PDF is part of a larger link farm, likely for SEO manipulation or distributing malicious links. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to potentially harmful sites.

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://ttraff.link/pify?keyword=the+great+i+am In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384152/normal_5f8ea55820593.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371808/normal_5f89519fdab17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374951/normal_5f96d98f5b302.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_5f944ab4638cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368751/normal_5f87abbe5646b.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/wonoti/gomitajulifaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/5th_grade_math_expressions_homework_book.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/butefepape.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/gugokujiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8515/9843/files/guitar_hero_ps2_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3340/6871/files/63889392645.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/intelligent_business_english_book.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/genetica_medicala_thompson.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/que_son_los_antimicoticos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8555/4369/files/wedawatemizixop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2549/0332/files/41837463079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5973/5456/files/rapiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5356/4583/files/45694381777.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_off00006127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6127 4836 bytes
SHA-256: 6187a381d3601028b3678bd91c621ada2b612838a194380a2974d8ff8e6f2a25
font_01_sfnt_off0000717a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x717A 10156 bytes
SHA-256: a4051ab0ffe8a6a0c44d34938339a29bb0bfa1325597c603d26fb44ee519b2fa

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