Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ca34447c8a0ee0…

MALICIOUS

PDF

33.8 KB Created: 2020-10-10 21:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 87b9cafac6547f856e40f32ea398eef2 SHA-1: 60857edb442d4595ff768ae159921afc74cacc60 SHA-256: 93ca34447c8a0ee085ec4fbc5232e93cee5ec3ceb7f34957088c5653abd3a96c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to suspicious domains and are flagged as part of a link farm. One URL, 'https://ttraff.link/pify?keyword=primitive+christmas+tree+topper', is identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains similar URLs, suggesting a coordinated effort to direct users to potentially harmful content.

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/pify?keyword=primitive+christmas+tree+topper In PDF document text
    • http://nuzodape.jjohnsonartist.com/uploads/1/3/1/6/131606295/cd7dd.pdfIn PDF document text
    • http://ridifir.loveadelyn.com/uploads/1/3/0/9/130969525/5402300.pdfIn PDF document text
    • http://zupolid.roberthessler.com/uploads/1/3/0/9/130969744/badijipavebuweto.pdfIn PDF document text
    • http://tozip.susefarms.com/uploads/1/3/2/8/132816066/1f0c3.pdfIn PDF document text
    • http://files.sandyfeetandtastyeats.com/uploads/1/3/0/7/130775796/1581467.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/f71e4eea-1dad-48b7-b7c8-8719198ffb9b/kimodobibuzupunovaled.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c4ae5f6-328f-4554-a85b-d104498f745d/favuzetobupulaseboliti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c5b7884-1864-41d1-9d0c-1671752440db/79930022145.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df31e2ee-69c8-4c46-ac58-f3f2c92f2b4d/tetupikiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b103534-3420-4c16-8eac-a2368dde17f1/fararirefifiwubizeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2039fa9-5d4f-4620-8ea0-ac65a61267e4/xumutiromafoxil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfaeed44-fd1f-427d-9049-43cfe81d9b53/tejixevudipexidezavev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3368/0282/files/instructional_fair_inc_worksheets_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/7634/6790/files/beatriz_adriana_arrepentida_y_sola_letra.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/8014/0188/files/engraving_swiss_army_knives.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/66965249176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0408/2852/files/33419573670.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_off000048a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48A4 5204 bytes
SHA-256: d157a051b3a9a3fd1e88b61e0cc04736cbc86bb813cc6610a7c0ca2df1b40703
font_01_sfnt_off00005a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A30 9560 bytes
SHA-256: 8dc4b246707614c9ba6fd4fca2b9fd919b2634f81628c79eed34680b956393fe

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