Malicious PDF — malware analysis report

Static analysis result for SHA-256 1158c16981fbd960…

MALICIOUS

PDF

45.5 KB Created: 2020-11-03 16:10:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c383408622836ec79a0e19ad0019dccb SHA-1: 1f086851f76bc98c92a188da6b12083cea1d7db5 SHA-256: 1158c16981fbd9601c35acbeaf4c45268e0f085d4f4f178e03841eab480c63cc
124 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector at 'https://ttraff.com/123?keyword=frizzle+frazzle+2'. The document's structure and numerous links suggest it functions as a link farm designed to direct users to potentially harmful websites, likely for phishing or malware distribution. The ML classifier strongly supports the malicious nature of this PDF.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.com/123?keyword=frizzle+frazzle+2 In PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/nulaxedi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382948/normal_5f930dd535ba0.pdfIn PDF document text
    • https://vasedowazapen.weebly.com/uploads/1/3/4/3/134320052/c23d07200b6bc.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/c2099e721b.pdfIn PDF document text
    • https://lewubudakaxawo.weebly.com/uploads/1/3/4/3/134342842/c37e4.pdfIn PDF document text
    • https://jikajulimag.weebly.com/uploads/1/3/4/3/134319013/tuwovaso.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/e354931f-8d81-4fa0-9b8b-2935276ea1db/shazam_free_movie_screening.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7750/8541/files/96529981333.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/ep152_form_certification_of_employment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13053bc3-be20-465f-bbdb-79909a0d7623/66864342833.pdfIn PDF document text
    • https://s3.amazonaws.com/mejediparaxi/lyrics_brave_josh_groban.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/how_to_create_table_of_contents_in_word_2016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faffaf48-f7fe-4d02-be00-390fe2e8f03a/dilelojaxiniduvademez.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_off00005711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5711 6104 bytes
SHA-256: 4cde527db156ef6d0c9d94be8a8d71411918807ffba98457bacaf8875596f3a9
font_01_sfnt_off00006c13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C13 4720 bytes
SHA-256: 3a8e34907bde0daf38af053561873c6a3339680e5a52f678067481b1138e6d7b
font_02_sfnt_off00007c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C37 14512 bytes
SHA-256: 5595bf88f52402d72c2141bb99bdd8ecfb5756e38f4d82041fcfedc40a974e8b

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