Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3ca17c21b93ba61…

MALICIOUS

PDF

40.5 KB Created: 2020-10-29 02:03:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 3dc4eb48ee36254b3ef673f687637bf9 SHA-1: 7c1a4040161062ec3aa61c841029006ced8e2c22 SHA-256: d3ca17c21b93ba610449d629766f2bc46c9578b81233e782ce94fa114a786963
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to known malicious redirector infrastructure, indicating an attempt to lead users to harmful content. The ML classifier also strongly flagged this PDF as malicious. The embedded link farm suggests a potential SEO poisoning or spam campaign to drive traffic to malicious 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.cc/123?keyword=life+note+soundcore In 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/64161011172.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3838/7607/files/spider_plant_watering_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9462/0333/files/australian_tourist_visa_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/zonobiwupotupidiluzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdf45b7b-f7f6-4f4c-a7a4-cf61c098bf70/82960395809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1819/0489/files/83332445461.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5aa8074-0fb0-498f-815a-0ddf0427f3ba/71708301096.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5244/0479/files/mecklenburg_county_register_of_deeds_vital_records.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/24558670658.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/64406984725.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/management_of_tmj_ankylosis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6621068e-6540-4b97-bdde-3491da6023c4/19801085550.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/kizosexov.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/85521777780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb6ed6ef-a018-40bd-910b-ee6d2e6a8965/saab_9-_3_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7315/0359/files/fudeba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67786c62-c7a0-41bd-97d7-40c7d8f610c7/17590963374.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/100_words_with_their_synonyms_and_antonyms.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/beauty_and_the_beast_prologue_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/melodemekisokidugiwaziwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0079/1715/files/inglewood_unified_school_district_board_agenda.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/61392230493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9715/2406/files/feveviwetukavawu.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_off00006058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6058 4712 bytes
SHA-256: f906423e4411cc0de82a5f2d404b1df726beee57fb8a9eba61d52aa85b5816c1
font_01_sfnt_off00007076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7076 10716 bytes
SHA-256: d9d1861422a3a719eb139b10e4ceb3d829886f892642394d18cab7f317627983

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