Malicious PDF — malware analysis report

Static analysis result for SHA-256 43481bf4efc99655…

MALICIOUS

PDF

48.7 KB Created: 2020-10-27 07:52:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 894eaa011fcab3f99afa288c27924fc3 SHA-1: 7761981bcfc06b72ef49211e94bee57e1062e0a3 SHA-256: 43481bf4efc99655227db1e7e3fc187128942fe5036c3e24b9a1fd2dcdbcb03e
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, many of which point to disposable hosting services and redirector infrastructure. The primary URL, 'https://ggtraff.ru/strik?keyword=do+soufeel+charms+fit+pandora', is flagged as a malicious redirector. This indicates the document's purpose is to lure users to potentially harmful websites, likely for phishing or malware distribution.

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://ggtraff.ru/strik?keyword=do+soufeel+charms+fit+pandora In PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/344092.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/ruwupiwexisifi-fikaritowunu.pdfIn PDF document text
    • https://vezorobabuwej.weebly.com/uploads/1/3/0/9/130969079/faneru.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/pajebox.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/4189472.pdfIn PDF document text
    • https://kodupupagunoj.weebly.com/uploads/1/3/4/3/134314474/foged-mogurimijazezof-xupixoxib-tekedo.pdfIn PDF document text
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/fezopiwufam-siseniwafinamaw.pdfIn PDF document text
    • https://malinozibide.weebly.com/uploads/1/3/4/3/134380659/surowumazi.pdfIn PDF document text
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/mujadawak-muxitafosuxe.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/2593159.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/dotepag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366309/normal_5f8f8beea023e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369633/normal_5f88433f16b10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369153/normal_5f9752df68943.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/efe8427d-2ded-412b-9234-e5f931626775/xonobifuwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2868c54-ee8a-4616-ae4c-b33dab7c4bd3/kifuxedateteras.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60b5137d-850d-4a36-8db4-2d8d48cfc6a0/kevopapunudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ba0fe69-3a88-4b08-bc61-63f74a0fa6d0/96652123280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17050423-83a1-456a-92d9-4a7a03929746/download_subway_surfers_mod_apk_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/292d032e-1de0-42df-b93f-cc9b41c27b3c/fogejun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a586f39-cf57-40db-8886-65584d57b057/bipom.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_off00006fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEE 5276 bytes
SHA-256: 217d66620d930dc4d97e5e5fad45d044334ed3b3210580cb731477b34e15a379
font_01_sfnt_off000081b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B6 11068 bytes
SHA-256: e8a786851070da866a09e7e67ac74aef379be1966377095e4fe50c26be90a869
font_02_sfnt_off0000a71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA71D 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333