Malicious PDF — malware analysis report

Static analysis result for SHA-256 1218ca765d86d01b…

MALICIOUS

PDF

42.0 KB Created: 2020-07-09 06:11:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2ba07ca642d8beb61aa1dabe259d755 SHA-1: d5a9969ea829643255f18ca49d58375cda4fef2b SHA-256: 1218ca765d86d01b1c9e85af99a71688166c1a786382b43ad12484e75a7e79a8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One prominent link redirects to a known malicious infrastructure at 'ttraff.ru'. The document's content and the extensive link farm suggest an attempt to manipulate search engine results or direct users to malicious sites, likely for SEO spam or phishing purposes.

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.ru/wb?keyword=quimioterapia%20de%20las%20enfermedades%20microbianas%20pdf
    • http://files.buffalotimberbay.org/uploads/1/3/0/7/130739343/vujewerowegukaf-tetevimitaxu-zigutu-nukena.pdf
    • http://files.whatkriscooks.com/uploads/1/3/1/4/131437832/nubekujom.pdf
    • http://files.marvinjwolf.com/uploads/1/3/1/6/131607023/6f564be9.pdf
    • http://files.alphadesign.studio/uploads/1/3/0/8/130874123/05df5.pdf
    • http://files.oursaviourchurch.org/uploads/1/3/1/4/131454549/kobufijolimet-gejesalunekovu-vosolimufuju.pdf
    • http://files.chenweimeng.com/uploads/1/3/1/1/131163920/841558.pdf
    • http://files.dutchessalanon.org/uploads/1/3/1/1/131164418/4827076.pdf
    • http://files.minutiamuse.com/uploads/1/3/2/6/132682819/womomatufotob_pomas_vanog_zemokima.pdf
    • http://files.mainstreetoptometric.com/uploads/1/3/2/7/132740482/3722786.pdf
    • http://files.murphymedicalwriting.com/uploads/1/3/0/8/130873838/fevewili-rumujez-batex.pdf
    • http://files.roundbay.com/uploads/1/3/1/6/131607269/b855589b345.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://jidolapuli.files.wordpress.com/2020/06/2917520345.pdf
    • https://kalovajonal.files.wordpress.com/2020/07/13037966570.pdf
    • https://sepuliw.files.wordpress.com/2020/07/83111392858.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/59022585862.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xigidewepiwunabifaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nitopufekuriwuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19252536586.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065f0.bin
f01fea4066db6dd8b164529c5c89b06839539b9532b60c0a54e333a01af0d13c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F0 5384 bytes
font_01_sfnt_off00007816.bin
35d01aafca27ab6025195f33fe4ba430c68d01b85a262c02dfc92dee4c0d0a9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7816 10160 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.