Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ddaae5a20716d53…

MALICIOUS

PDF

52.4 KB Created: 2020-10-08 13:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e31be4368ce02e12e19da7c57ae07b38 SHA-1: b7cf38a49edfb99de5873bada4c8edf531b68032 SHA-256: 7ddaae5a20716d53f97ee6caeb925aca1b17428e96ca6817ccb2b55b98c9c1ea
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 and appear to be part of a link farm. One of the URLs, https://gettraff.ru/pify?keyword=types+of+scales+music, is identified as a known malicious redirector. This suggests the document is designed to drive traffic to potentially malicious sites, likely for SEO manipulation or to lead users to phishing or malware distribution pages.

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/pify?keyword=types+of+scales+music In PDF document text
    • https://site-1040045.mozfiles.com/files/1040045/vafubutukuzowixifam.pdfIn PDF document text
    • https://site-1042780.mozfiles.com/files/1042780/xarabebilazes.pdfIn PDF document text
    • https://site-1037028.mozfiles.com/files/1037028/35988826035.pdfIn PDF document text
    • https://site-1037189.mozfiles.com/files/1037189/kojupuzigujorubid.pdfIn PDF document text
    • http://gijija.allthingsartstudio.com/uploads/1/3/0/8/130814106/7455893.pdfIn PDF document text
    • http://files.encourage-fmhs.info/uploads/1/3/1/6/131606059/2715128.pdfIn PDF document text
    • http://files.crrcshows.com/uploads/1/3/1/6/131606253/vewonusasikur_nunosakusi_gapadajepoke_mesenux.pdfIn PDF document text
    • http://files.sno-puffsamoyeds.com/uploads/1/3/2/6/132681026/misobamu.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/f169181c-9cb7-42b7-8b84-45f12df67df9/dalareligorokazowixira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad94340c-e2dc-4afd-b8ad-689493d58ad4/17131235448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/088ece37-3711-4d7c-bc8d-dacfc0f98ace/78132338668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d824df0-8eed-4ef5-8ab1-8b534d6bf35d/magelunarerajeliseg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/082a908c-f94c-4e1b-96dc-12302de9d2fb/waxejerakemuratasug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49aac081-2104-44cd-a098-3ef0a263c574/wufasowadejikozilabufup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86085b07-9a6b-4c34-a43d-f925780692d6/36756166046.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_off00008e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E57 5116 bytes
SHA-256: 7165c6382bf715dba69979457db6f4b1b6467aba0c455b9eab58ff9c89b7f9f4
font_01_sfnt_off00009fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FC4 10736 bytes
SHA-256: bd5ede2acb12e805d3006c5829df9186fde9e9350352e2699eccf1e01fc0b224

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