Malicious PDF — malware analysis report

Static analysis result for SHA-256 76298cbf17d506a9…

MALICIOUS

PDF

45.5 KB Created: 2020-10-22 17:39:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d42cda4c8c6809fa6fa894ae3c41c531 SHA-1: df6fd8d0ee1b35ea607b6a83e9c8e8a68b76a411 SHA-256: 76298cbf17d506a96d9fce12171ed3cf798441653d5e564f01999efc28d2beda
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=localizar+iphone+perdido+desde+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404503/normal_5f9180eca09ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380863/normal_5f8f3010051fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f89c89a48985.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368503/normal_5f87fa23896f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370768/normal_5f8ee093da035.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386330/normal_5f8df75484edb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368962/normal_5f8a386c809c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388279/normal_5f8e57a8c3ad1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/9948/0998/files/38098981322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/4080/2469/files/form_no_13_income_tax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1673/0799/files/wubuwepitimedaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1450/7672/files/sony_rx100_iii_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5698/7797/files/lake_guntersville_fishing_report_october_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/91924887463.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/8357733415.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5661/8917/files/works_cited_examples_for_middle_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3838/7607/files/can_you_add_music_to_google_slides_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8956/3299/files/the_north_face_surge_backpack_amazon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0040/3880/files/99361401122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2093/4056/files/olathe_school_district_job_fair.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/11779088850.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/jufilom.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/pevabujadiburakubug.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/juvunikumon.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_off000071ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71EE 5152 bytes
SHA-256: 35a92ba51c541ff6242d6bbc5a26cd1c1b827574e7c1bc4382775829e09db885
font_01_sfnt_off00008366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8366 10724 bytes
SHA-256: 1c703cc6707784bc76b198c725f28e7c1804d32808ca10ef7fe02816fe6cd3b2

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