Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a2279ef5ae5fa69…

MALICIOUS

PDF

44.6 KB Created: 2020-11-07 22:09:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3fc49b94ad61c62cd190cd812356e888 SHA-1: 96f9d3c3efb126ecdbf4941111930212a4c20a53 SHA-256: 6a2279ef5ae5fa69ac9a6946b803443693653ff26f9b07ccb3348a8424644296
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO spam or redirecting users to malicious sites. One prominent URL, 'https://traffset.ru/aws?keyword=dead+rappers+list+2018', is embedded within the document body and flagged as an external URI. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's part of a link farm, likely intended to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?keyword=dead+rappers+list+2018 PDF link annotation
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/tugunari_fogeze_nezejavoz.pdfIn PDF document text
    • https://paxesejok.weebly.com/uploads/1/3/4/3/134348383/f28ad4f56.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/93560651632.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/remotr_game_streaming_sign_up.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8887d1a-de56-4286-95f7-11792aacdac7/49716301908.pdfIn PDF document text
    • https://nevosaxovib.files.wordpress.com/2020/11/fizimobaruweboratiweti.pdfIn PDF document text
    • https://wepigun.files.wordpress.com/2020/11/nopevifivibilemafelifix.pdfIn PDF document text
    • https://wumevom.files.wordpress.com/2020/11/66792402099.pdfIn PDF document text
    • https://monirasuwa.files.wordpress.com/2020/11/82155965525.pdfIn PDF document text
    • https://fimalul.files.wordpress.com/2020/11/xenikefeg.pdfIn PDF document text
    • https://zegasaxum.files.wordpress.com/2020/11/gerumiwaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88cd2fa9-c36a-47bb-a2e9-453d76427481/bekuzinagixofasunipuz.pdfIn PDF document text
    • https://nopebukivaw.files.wordpress.com/2020/11/geometric_sequences_worksheet_answer_key.pdfIn PDF document text
    • https://balapep.files.wordpress.com/2020/11/wefibovawevad.pdfIn PDF document text
    • https://dinozab.files.wordpress.com/2020/11/apush_concept_outline_period_1_answers.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_off00006e1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1D 5472 bytes
SHA-256: 919477b8c4032cb40ced2c7560fbe81178d12cd5a52a839a09169d769a56af85
font_01_sfnt_off000080c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80C9 10916 bytes
SHA-256: 612d9899a51ca7221c54c34b51e08618d54b1c466bd50d8becc95b77364ebe44