Malicious PDF — malware analysis report

Static analysis result for SHA-256 d015e83d6d975aa3…

MALICIOUS

PDF

55.0 KB Created: 2020-10-21 21:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a8d52eb802d8baa7c775847fe6ad22bb SHA-1: 7befe78bedb0bd6c403313a1676fc94d089d94e5 SHA-256: d015e83d6d975aa38cc01a7e7feeeb7cfdd7828ffde2bec1f7d57e63e5563642
134 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=topological+space+examples+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380405/normal_5f8da8c34c677.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f8a97cfba808.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376120/normal_5f8c81cf1c3b9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bfeedad-6310-4fcd-9876-351978462cca/31231628670.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/420e456d-7ca7-4a81-906b-957de31c6935/resanufofopidemisizuvaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c0f211d-ba5d-4bc0-a695-a8e97c13e65e/kisadegufipowumomumozi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1ae7054-0534-4761-8788-a51eb59643ea/sexejebuzesiwupilezaguzox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c54007f-335b-4c1f-93fc-dc56758d237f/potebuxunosapibor.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/munojopamigudixebuvafa.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/jefofibinaniz.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/86742160580.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/sopefabutomim.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/approximation_questions_for_sbi_clerk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8535/7743/files/microeconomics_for_economics_251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3253/3922/files/wofilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2906/0001/files/jomamaberajajujip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3340/6871/files/d51_schools_facebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0115/1128/files/85114927650.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E41 5396 bytes
SHA-256: a5eed7f3784620f74d04f84c3470afe3811a84eaf34da422551533009092df05
font_01_sfnt_off00009090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9090 11056 bytes
SHA-256: e001d92e65047ad0f8251d2a068c6082e7d9d254cead4d60668a0066b2a12593
font_02_sfnt_off0000b698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB698 16880 bytes
SHA-256: 7ee583507b6219c57d884543110da352a8b22309a8bd1d4214f1ad1c7322321a

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