Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fbb542817c3a8b8…

MALICIOUS

PDF

61.6 KB Created: 2020-10-26 04:31:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8a4fd3e8944c8dd706efe7e35e33a4ca SHA-1: d14425da8c7e951839e9b44451c565bfb392af43 SHA-256: 6fbb542817c3a8b8e0c9a1b32e02a6baa1def4ac725c9653d6b969e2d3089bc3
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 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.club/123?keyword=deltascape+4.0+savage+text+guide In PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/mojudedosi_gugakazeno.pdfIn PDF document text
    • https://wusoxebuwewete.weebly.com/uploads/1/3/4/4/134432123/3e89674b78.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/kotosatodemusotewe.pdfIn PDF document text
    • https://waratonis.weebly.com/uploads/1/3/4/2/134235653/ca04be027f48ab4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388598/normal_5f8f70f02a7da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384154/normal_5f8cc0468aee2.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/1/0437/2755/2661/files/listening_skills_british_council.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6776/8981/files/fibromyalgia_symptoms_checklist.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4060/2269/files/publications_office_interinstitutional_style_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/linda_colley_britons_forging_the_nation.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/96200748090.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/54311241126.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/mathematical_physics_satya_prakash.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12491371-144d-4334-99f5-ca1a07354742/60736128977.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a71110c-8a3c-45b5-b717-87464c00ddb9/81615448182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1389b440-8648-415f-8247-54afadfc04d1/caterpillar_3208_parts_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e548d83c-4412-4a41-8b3e-76cabdfe5653/14044819321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a28d366-58e4-4fd2-9166-b901d1383dc9/22456286603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8307/0629/files/verizon_4g_lte_mifi_home_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7653/7499/files/21_guns_tab_easy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7937/3478/files/dd_players_handbook_5e_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/8277/5212/files/52206061376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5767/4920/files/jasizakutojujilunajeb.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA520 2900 bytes
SHA-256: b3dfb2f2c41da7350fc3755141d2fd0ea5796bb125df25fec831093623ff73df
font_01_sfnt_off0000af63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF63 5536 bytes
SHA-256: 8ea6b82b758ce64b1be012ec64e76080fd142dc22699934da59ee7a65927d6d5
font_02_sfnt_off0000c265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC265 11484 bytes
SHA-256: c2083b7b417f0a0c16e9d589fd7795045b0f7e9b19db08e9d4160a36d239edfd

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