Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9188483ac078e4a…

MALICIOUS

PDF

61.3 KB Created: 2020-10-26 22:43:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4ba7e0af3abdd7c4cd59bdd3cb90113b SHA-1: 91ca31b867cb6697251b6f3669ad2b3559587c66 SHA-256: c9188483ac078e4a7367cc8154a68aff61607d6e669bafd10ecddd82d451eb56
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL "https://ttraff.link/123?keyword=que+es+la+eutanasia+pdf", suggesting a lure to disguise the malicious link. The PDF also contains a large number of external links, characteristic of a link farm, further supporting the malicious intent.

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/123?keyword=que+es+la+eutanasia+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f87157c120fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375095/normal_5f945d6aaa998.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5f90e86345711.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_5f932ffac5bec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387433/normal_5f933e3786acc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374703/normal_5f8c3c2180bcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369332/normal_5f8853887d3d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391915/normal_5f907b1bec58c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f87022f1bbc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370268/normal_5f8a2c82bee55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369525/normal_5f8c273a9e4cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_5f92586ea3b1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378607/normal_5f8c9665e24a0.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/9dd269e5a4679c9.pdfIn PDF document text
    • https://gemenudotipetal.weebly.com/uploads/1/3/2/6/132695720/vetetikosotuzafiwop.pdfIn PDF document text
    • https://vebifejelib.weebly.com/uploads/1/3/0/7/130775119/mitorefa-dusisukom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3840/6806/files/kopachuck_middle_school_gig_harbor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5057/3719/files/bisuxebiroge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7794/0886/files/nogubusen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7088/4514/files/74368590612.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/rail_reservation_form_download.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/brake_test_on_dc_shunt_motor.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/tecnicas_del_aprendizaje_colaborativo.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/akashic_records_books.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_off0000a340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA340 4772 bytes
SHA-256: c93cba9700264094b6f85353d11bf35e97277b4fa273a65fab5c29489822395f
font_01_sfnt_off0000b389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB389 11720 bytes
SHA-256: 3b095337139d08e9661194fa03193047ca3db3ae084fa69f54733d2f6233fc7e
font_02_sfnt_off0000d9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C2 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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