Malicious PDF — malware analysis report

Static analysis result for SHA-256 493c1a899fa38bf8…

MALICIOUS

PDF

45.4 KB Created: 2020-10-27 07:24:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4c0f2ad471474a8f31bd7dabccb3192e SHA-1: 40ed4bf5bae21c1e9618935b2f4d08cd6da25467 SHA-256: 493c1a899fa38bf881c219c84ba7c1deccae1ef5a240e77869e427ea17dd3a4d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded links, with a critical heuristic identifying it as a PDF SEO link farm. One of the primary links, 'https://ttraff.link/123?keyword=dr+tilles+website', is flagged as a known malicious redirector. This suggests the document's purpose is to lure users to malicious sites, likely for phishing or malware delivery.

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/123?keyword=dr+tilles+website In PDF document text
    • https://rijizego.weebly.com/uploads/1/3/0/7/130776487/samuwozasana.pdfIn PDF document text
    • https://xotukejurivaj.weebly.com/uploads/1/3/4/0/134016857/7999545.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/dutorewal.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/3ee23104-d407-4831-86c5-fd38bcf5ea21/wubiwazevum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14d89daf-31c5-43a8-9f23-67adb89b2a5e/zosimaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c99bc1-4c7a-4ebc-bacc-659e7f782438/4880525288.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac9040bc-526d-4861-bc42-39759b4402d4/66737853475.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aad5ca5f-dffd-4109-b988-43fa53ebc9ce/87398502370.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3837/4553/files/faguf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cec3cdd9-839a-4f82-aa17-5c058fc9654e/86932046428.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10cc05cc-1820-4e29-949e-ef482c175b54/world_of_warcraft_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d11569b-141e-42fa-96f2-eb4074dd5fec/pogunuwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91b5f193-ddca-47a7-843f-26406d2de96f/overcoming_the_dark_side_of_leadership_book_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5631f92-25fe-40a1-8854-528315695f77/68111258173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2be5bb3-2cfe-4f7e-a588-e68e0ece09a6/gewufowefubosej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77ef15d4-a45f-4015-a216-9cdecc1f5be5/98809300187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d8bf963-e1f6-464a-b7cb-3fd3f467c859/96678210270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eafd86e-11ed-4b4e-a17e-ca9e650e9d9c/zenemevuvuturedujuxorabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d7bd4ee-61e5-48fe-b216-43824322d4e5/33808164320.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/articles_on_quality_education.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/hangul_alphabet_list.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/wazifepiwiz.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/dalusatevo.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/67549421631.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_off000073bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73BC 4700 bytes
SHA-256: bfe06833db4970e6185af4792dede3f4e407c96516df765ccbf15df18a2e0ddd
font_01_sfnt_off000083dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83DC 10688 bytes
SHA-256: 9a50ba80779e389b63c534c16fab4ce7532d4373a92b37f5ed4bfe669bd4313e

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