Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e8980098efaa39…

MALICIOUS

PDF

46.3 KB Created: 2020-10-16 02:13:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9e99e749c378879bb90f048744323681 SHA-1: 3af7cd47fc0671c969c76a38f19b7b1e5c394851 SHA-256: 48e8980098efaa392c686c37b51292f6997b89cf1e1c6e19b79c443ec34f5a3f
124 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://gettraff.ru/strik?keyword=franklin+barbecue+a+meat-smoking+manifesto+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The ML classifier strongly indicated maliciousness, and the PDF structure itself points to malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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/strik?keyword=franklin+barbecue+a+meat-smoking+manifesto+pdf In PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/8600574.pdfIn PDF document text
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/sirorepiwaxise_vosupemeras.pdfIn PDF document text
    • https://sonilotosoj.weebly.com/uploads/1/3/1/3/131379329/bovukojidixo.pdfIn PDF document text
    • https://ritibamubube.weebly.com/uploads/1/3/1/4/131437410/nixenadim-xopowejimige-sesobopeger-pivevi.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/manalubagike.pdfIn PDF document text
    • https://site-1042841.mozfiles.com/files/1042841/38863484299.pdfIn PDF document text
    • https://site-1039212.mozfiles.com/files/1039212/dcs_vs_plc_difference.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/a78303f5-48ad-4e9d-8566-b18253f6aab3/bolamarobipemobipevapuvat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3f705d6-05e6-4478-b736-f64d1e10a000/xogetivafulipobadize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cb1f3fc-a43e-4f59-86ca-5c77f5163a7f/pexutirimog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2937/2836/files/gonavusawakok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5027/7783/files/maikling_balagtasan_script.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d57375f-a0b5-4aef-a37c-8ea0826e37ce/11716007127.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2df29d96-4cd3-45b0-b414-39335a422a21/85416975050.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5be1d9c0-65a8-4c3a-a714-594132183b92/70318164164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6080/4770/files/64229177769.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0612/7003/files/80264266034.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_off00006812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6812 5548 bytes
SHA-256: dbaa5370cc90403e6c57a3032a27db4d98bb62e5e5a79e403f510ac68750cbd9
font_01_sfnt_off00007acb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACB 10240 bytes
SHA-256: 7b9979103dd7ad74dfa20a94c737bbf571782482fab6e3ee6f8eb6a557fe9428
font_02_sfnt_off00009da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DA6 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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