Malicious PDF — malware analysis report

Static analysis result for SHA-256 59b627a838ac8139…

MALICIOUS

PDF

53.4 KB Created: 2020-10-19 14:04:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: b0fb76c98f2cd13156934b9076f00358 SHA-1: 6a800787deaeb96feafd2aadb28835874e19a862 SHA-256: 59b627a838ac81392fbd09ac51d35dbd782f6480047aef8b88bedf3785749645
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/123?keyword=download+spotify+premium+apk+july+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369305/normal_5f8c09e69df35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371505/normal_5f8d334e75f7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5f87cad76be16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f89f59abefe2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368978/normal_5f8828a7a0e0b.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/filosom-lusiwikafese-jerupuxorukoti-novubolifunuw.pdfIn PDF document text
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/modovesibowemoj.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/kasizaxisomu-jajalesuveva-zefafofoxufo.pdfIn PDF document text
    • https://rogidalot.weebly.com/uploads/1/3/1/6/131636841/3126616.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/69a06c8736.pdfIn PDF document text
    • https://zukamukenipebo.weebly.com/uploads/1/3/1/3/131380388/4224222.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/sufiku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6093/1991/files/the_selection_kiera_cass.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/1098/3589/files/how_to_write_fanfiction_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/android_activity_finish_with_result.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8914/5245/files/56462038248.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d5123ab-2257-43e2-a35c-84b865d52d35/xubafat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00a21fc4-4e36-4150-b8db-9d1866289c21/a_song_of_ice_and_fire_epub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/139accfd-bd01-4ea2-abd4-cdfb38894408/visowurajibanalog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6e7179e-b70c-45e0-96be-c964308d5afc/62353822888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84b64246-7d20-44eb-a6da-a81a44f7cbe0/76801254796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/830e26a2-c272-4f63-8bd6-0a43eed3e22e/30338905170.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cb6f0f4-3270-4c54-9cf2-3b43f9d46d8c/67560287264.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_off00008ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE0 5796 bytes
SHA-256: 939498555b1863bb51e82fbad8827bcbbff6b0f8a4e6779662699191aea246ae
font_01_sfnt_off0000a0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0A8 12180 bytes
SHA-256: fc9cc96c476cc8728da52280c144468bfec63a49b3ee6887b50263bc7389ffdc