Malicious PDF — malware analysis report

Static analysis result for SHA-256 963939e2ff6831f8…

MALICIOUS

PDF

45.2 KB Created: 2020-10-18 13:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d66f470701bda026682c4fdcc3cc1cd6 SHA-1: e211d3868b0129989f08766bc5b532b6de1b8ce0 SHA-256: 963939e2ff6831f87528158b1892fbd897ae590efd286cc7ded8257aa988bc74
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://ttraff.me/123?keyword=acustica+audio+gold+3+manual In PDF document text
    • https://wegupufula.weebly.com/uploads/1/3/0/8/130813429/falagulimogixegugeki.pdfIn PDF document text
    • https://kakawugob.weebly.com/uploads/1/3/0/9/130969990/siwolosubifibaro.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bagatazojiz_sidatasofugugor_sofaxazute_gureluf.pdfIn PDF document text
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/piwutesufeburoset.pdfIn PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/7863770.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368999/normal_5f89b13d23a0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f875abdc15b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369307/normal_5f88d84eb28f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_5f89b5c868fef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369508/normal_5f8aae7e2fdf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367621/normal_5f89542fbef45.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/1/0437/2427/5866/files/ev_free_fullerton_library.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3254/2369/files/free_fortnite_account_generator_with_skins_ps4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2935/5432/files/mont_blanc_card_holder_mens.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/8225/2957/files/teamviewer_quicksupport_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f779120-d212-4303-8d8a-d6e11402162b/63799252209.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e931bd91-86ec-45cc-895c-5f10de3d4ff4/44736049866.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_off00006524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6524 5080 bytes
SHA-256: 8f4b54c0669937daa511eccb81a5228a6796b611f9ecf8c7c3a73ef0b55cfb36
font_01_sfnt_off00007649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7649 10360 bytes
SHA-256: 26f1c1b24fe14ea27a2b2f18fdda7850899faed672889e601541c62936dd5ed8
font_02_sfnt_off000099d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99D2 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c