Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bde7eae30c67b5e…

MALICIOUS

PDF

56.9 KB Created: 2020-10-27 21:23:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 9f8b29dbf21a35030ba67aa012cd08e5 SHA-1: 1ffc437b30bb8327f53315b690a3be5376fcb1d2 SHA-256: 3bde7eae30c67b5ec5a54b39f5a0ef5d9dca7727a8d540813d23013ae80bc1d9
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files, characteristic of a link farm. One of the primary links, 'https://ttraff.com/123?keyword=bergen+county+churches', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL.

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.com/123?keyword=bergen+county+churches In PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/dulefipalep_jobowajoxugo_wiribulelom_nuzigo.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/tatode.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/naninuvirofeku_worumaleris.pdfIn PDF document text
    • https://vatubovelogised.weebly.com/uploads/1/3/4/3/134375195/vujur_gugivutipas_lunasuvarikav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fasanag/1790086280.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/xanila.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/palmistry_marriage_lines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3210/7937/files/96689883045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4535/8234/files/38317737106.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3034/6390/files/rolling_garden_seat_home_depot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8671/8129/files/ruduwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6274/7545/files/car_mp5_player_android_phone_mirror_link.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5724/5077/files/274922549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5128/5160/files/petexifuwenibokolu.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/nato_phonetic_alphabet_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/paxiwiguji.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/tratamiento_varices_esofagicas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43578875-88ca-43a8-b118-a9569ea26e62/vebamerosunubapoxini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/055140e1-5a72-43b2-9b3f-d3ac46cbe6f7/psychology_objective_questions_and_a.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_off00009daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DAF 4972 bytes
SHA-256: 0c8c81c4cb74dc443219428464519a8e14441a9d1f5bfcc2b96eb97ed4dd496d
font_01_sfnt_off0000ae9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE9A 11692 bytes
SHA-256: 4958c6822df43085b469a4c81d2ddde079149f50c8bdfa3694bc6ccd59c85e0c

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