Malicious PDF — malware analysis report

Static analysis result for SHA-256 2efdee496d3a4073…

MALICIOUS

PDF

53.5 KB Created: 2020-10-16 10:36:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5c7faf1a5c79f7edd1a7ac0ecb1702e2 SHA-1: a8136c4d35ba18329c34a3bcea4674288641a047 SHA-256: 2efdee496d3a4073fe380514904f2b4b34982ff0b1c81fa1e5eba60f8cb7124e
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to disposable hosting services and redirectors. The primary redirector URL, https://ggtraff.ru/123?keyword=android+fragmentpageradapter+or+fragmentstatepageradapter, is known to lead to malicious infrastructure. This indicates the document is designed to lure users to malicious sites, 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/123?keyword=android+fragmentpageradapter+or+fragmentstatepageradapter In PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/tidevi-muxajamireja-jilatudiwixa.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/belufokomodosijimona.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/zubezebarogala_masisemofo_kadag.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/xopevu_vilugarokobijos_fimorekon.pdfIn PDF document text
    • https://zuxuzesis.weebly.com/uploads/1/3/1/4/131438019/a80a069777.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370547/normal_5f88a44256fa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366398/normal_5f8765dd81f90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374519/normal_5f8937861fecc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f873eb22840a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_5f87518a89669.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_5f88a58dd3f2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5f875288e82cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368474/normal_5f891e08a81c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_5f887ebf9b89e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5f875327d9787.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f86f5d62d348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f893c95c4152.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367287/normal_5f88c8d7a53b1.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/e5936694-d9aa-4c26-8abd-ca45fb0773bb/jafuvidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75031b1d-5f0b-4fb6-ac05-c563f60b4264/zezamelozexedudobag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3046/3135/files/73665301099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2599/0300/files/swtor_class_guides_2019.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_off00008642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8642 5108 bytes
SHA-256: f88856c96dcf2408a6a0d6130c3b182dbfff2c1932e8fabd66e597d7103c7b3a
font_01_sfnt_off0000977f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x977F 10096 bytes
SHA-256: b0d44a752b3bdb840e58a582b1bda3385ec6cd0f21aed633d04083483ba2689f
font_02_sfnt_off0000ba10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA10 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3