Malicious PDF — malware analysis report

Static analysis result for SHA-256 63477e5f8e05af5c…

MALICIOUS

PDF

46.6 KB Created: 2020-10-25 23:30:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 89e7f4be2f1eaa97e6a410bd591825c4 SHA-1: 9ca14857940505c444cf543a00a6e21a46d23926 SHA-256: 63477e5f8e05af5c6d7865e01401f5e183e375ba8e06e971cec0f9e130ef7857
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by an ML classifier and contains numerous embedded links. Several heuristics indicate it functions as a link farm, with many links pointing to disposable hosting and one redirecting to known malicious infrastructure. The primary purpose appears to be directing users to potentially harmful content or facilitating SEO manipulation.

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://ttraff.cc/pify?keyword=internship+experience+letter+format+pdf In PDF document text
    • https://nudopimiga.weebly.com/uploads/1/3/1/0/131070212/1794f5a8debb.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/gopabi-xixiko-donodije.pdfIn PDF document text
    • https://nurekagenarufab.weebly.com/uploads/1/3/1/6/131636906/gijupixezilu.pdfIn PDF document text
    • https://dokarugosili.weebly.com/uploads/1/3/4/3/134362608/14005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369802/normal_5f92d4b495b38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366642/normal_5f87423fb10bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369779/normal_5f8d97b9174ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f87015468390.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368747/normal_5f8aa18ae6ea2.pdfIn PDF document text
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/nogabipoja.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/7517693.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/mexitivow_zapeweredo_kemigofine_tijogorugevit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5657/8206/files/vigo_video_apk_old_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/2399/9391/files/jumezonizuvoxesurivoba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2855/9510/files/adidas_micoach_watch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8648/8767/files/aapko_kya_chahiye_english.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/correlative_conjunctions_list.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/84000056795.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/lipofuscinosis_pediatria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1791/6575/files/vukapimil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2536/6165/files/animal_description_worksheets.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_off00007771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7771 5400 bytes
SHA-256: 9867e5d37cfffb0ad3a380ddedee776e3b1895b557cef68f9fc1b915002bdea0
font_01_sfnt_off00008996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8996 10280 bytes
SHA-256: a20ca2eddfe6e7fa0b6098bd819001c8f1cb838057681630ec5703910019366c