Malicious PDF — malware analysis report

Static analysis result for SHA-256 551d6a10e4e6c0e9…

MALICIOUS

PDF

51.7 KB Created: 2020-10-17 18:31:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9a5de028f5f88f74f5ab832146cab367 SHA-1: f3ab1d97c9e97fd9952a95e2f8ea477158981764 SHA-256: 551d6a10e4e6c0e9e0da3e48d7e900c16bf9101f4984f91c789a4016c6ead937
184 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable hosting, designed to redirect users to malicious sites. The document body, though partially corrupted, contains a URL that appears to be a lure for 'Grey's Anatomy' content, likely to entice clicks. The ML classifier strongly indicates maliciousness, and the presence of redirector links confirms a malicious intent to lead users to harmful destinations.

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=grey%2527s+anatomy+season+15+episodes+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367297/normal_5f873c1f78b76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376362/normal_5f89f30288a33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375204/normal_5f8939f894308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f86f9c01e1ac.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/kozasoj-gapuro-zuwidaru.pdfIn PDF document text
    • https://jurizimobijagi.weebly.com/uploads/1/3/0/8/130874317/7660470.pdfIn PDF document text
    • https://topodomero.weebly.com/uploads/1/3/2/6/132696018/5bc1a93.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/1475288.pdfIn PDF document text
    • https://dudikojegak.weebly.com/uploads/1/3/1/4/131406444/700947.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/wogiselaruto-nokage.pdfIn PDF document text
    • https://bewupoterefi.weebly.com/uploads/1/3/1/3/131380107/gisopinur.pdfIn PDF document text
    • https://buluzuzumaz.weebly.com/uploads/1/3/1/6/131636727/4265599.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/vofav_pugakam_bijijufajanonip.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/wijigomofiweb_lotitosede_jukis_dirum.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/vudodapazepipux_kijemomebegax_velagokotukif.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://uploads.strikinglycdn.com/files/6809813f-7ff0-4433-b10c-bce0ddced042/watipumaziwujafigezixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12d331f5-e510-4b37-aee3-27e58a01bdc0/lijujejepexeririlovaraw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2f6bbb4-e01f-45b6-8680-8a555fa918a8/zikunadonuxaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bdcd235-503b-4303-aba9-3b07969be61e/tovutepedivakuriz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c0856b3-a7ff-44cd-81e0-9a5a3d82f54a/3132137316.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bef9f3ea-a8b3-4bc3-b255-2646e6f2af71/zinabokafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c2b0491-a2d9-470e-8b24-caa9cec69ab5/terusegereluzase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db420fc5-7137-4c9d-8880-d22e250b1e6f/wexijes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6781fc60-7829-4020-8a76-55a0e7d47485/96529991483.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_off00007c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C2D 5472 bytes
SHA-256: fbc3326ea849ed6fd3feb792827b9ee21b2088385f12bec7090a209fb6dcfd0e
font_01_sfnt_off00008eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ECA 10560 bytes
SHA-256: de343d9428189e417813d0e7b9e8a8154079cf71b3093a60ed14943025227bf0
font_02_sfnt_off0000b29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB29E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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