Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd805f91fb52d910…

MALICIOUS

PDF

44.2 KB Created: 2020-10-26 20:52:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c57acfa172d0d77277313eee922c1cde SHA-1: 22590617ffb010c31c82112d042773120258caa2 SHA-256: cd805f91fb52d91079697d57c14d193678927c44d40902ef2e64b8bd3b83325b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ggtraff.ru/strik?keyword=pills+n+potions+lyrics+nicki In PDF document text
    • https://talapilodegopez.weebly.com/uploads/1/3/0/9/130969507/c75b2532f.pdfIn PDF document text
    • https://wawaxotev.weebly.com/uploads/1/3/4/3/134368025/69fc78afd685.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374374/normal_5f90a53c6967d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370063/normal_5f8fbb925bee3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369182/normal_5f8d67db9a370.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374853/normal_5f8cfcff55c34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5f89dd0fd962a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9856/9381/files/dish_network_hopper_duo_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7514/9234/files/hp_envy_17_specs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7779/3960/files/webakuwugakoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5294/0968/files/free_word_search_printable_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4430/1731/files/blacklist_duty_finder_ffxiv.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/auditoria_medica_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/38791979254.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e686d03-4abd-4229-8644-841cc8ea135a/32670881473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59801817-05be-4740-a89f-4328da0cad75/60844181980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66848f66-1d1a-4861-a848-b8273b2c9623/concepto_de_salud_segun_autores.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/297f7633-4020-42bb-80af-39aba556b2aa/64045408370.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b22f143-a928-42e1-9575-a3bea3d18c4d/9756656566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c83676d7-7318-4613-ac01-ad1d1ad8428e/22626402860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6394d331-03f9-4d55-93ad-c91ce774be7a/mortal_instruments_books_epub_free_d.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9354f64c-55f1-4edd-87e4-2ad977459e57/subnautica_how_to_use_alien_containment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a535af59-60fd-4cf6-8895-a891085e82de/laverifelunagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2c32bf6-1dad-41fb-887c-b5f0b2cfae9b/84275920314.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6360 4884 bytes
SHA-256: 369a9340541c12f02327060b6ebd8c3c21f3afaafb54dd19e36490d885333c56
font_01_sfnt_off00007400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7400 6060 bytes
SHA-256: 9b27139e79c87a13d85f0fc961eeb1fd6fb1d37f8ebb01063a551955fafa5b97
font_02_sfnt_off0000837d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x837D 9436 bytes
SHA-256: 29ece9aacdebb7dedb1d9831c67c86bf39eb32a01be44f0d8551d3c983733f54