Malicious PDF — malware analysis report

Static analysis result for SHA-256 e612f76aa8638aaa…

MALICIOUS

PDF

69.4 KB Created: 2020-10-20 23:30:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d2b1ee7dfe8ba2b8586d02086da80a4b SHA-1: 6c73d9bd2717a611a77b9f2aadb2287f8f64eb02 SHA-256: e612f76aa8638aaa7f39c30146d0a10877af2ce03cd7761ebcf75fbcfbe8d5dc
184 Risk Score

Malware Insights

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

The PDF document contains numerous links, many pointing to disposable hosting services, designed to create a link farm. One prominent link, 'https://cctraff.ru/strik?keyword=deadpool+2+online+free', suggests a lure for free media content, which is a common tactic for redirecting users to malicious sites. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious link farm.

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://cctraff.ru/strik?keyword=deadpool+2+online+free In PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/xuxaxomafati_zidapagizuta_gupepojive.pdfIn PDF document text
    • https://tevirilozarenov.weebly.com/uploads/1/3/2/6/132695732/xarapavujilugiz.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/lejexafopotak_nuwevirafikuv.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/3483500.pdfIn PDF document text
    • https://vodiwisilob.weebly.com/uploads/1/3/2/6/132681054/9902509.pdfIn PDF document text
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/875387.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/f37bc620.pdfIn PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/xiradibazuloduva.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/wuxuvadure-fanate.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/dunawopalege-xuvejaju-takarorijuvina-tikumexobej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/aebfae98-ce20-41f9-9cf6-facf67262a62/jibok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/218f15e2-15be-4108-8a6f-fb60c87b79d3/golalirutupujexepifilazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e473c55-1e5d-4e3f-847d-f0ab1d492aa6/gasosulesatelitezebinobul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7934e8da-a22b-4a39-a0b3-7367db57b9ed/25617026205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6a02a17-1fea-46bf-8933-e61f0405bb3d/raronewejusemawiviteziju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0977546e-a35b-4463-825f-de2469c17962/8370210022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/709b42e6-2d5c-4dbc-a591-c9ed82af3c65/fonodazalojuvamibipam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8418173-0309-44cd-94ed-fe6713fb5dc7/watch_full_insanity_workout_videos_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/mojamivetivoledite.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/17385525469.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/wedunovanutefari.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/92185547724.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/waxutinutejopanud.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_off0000cfc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC3 4988 bytes
SHA-256: 93e51e370b673cc4874f9c212670fdb9e0d21010050fd745bec4da8628cfe916
font_01_sfnt_off0000e0cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CB 11728 bytes
SHA-256: b884cdd68183ec212d325bc9abfafd3ff4dced8424d522179fdb902593c01793