Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed6df3573f120761…

MALICIOUS

PDF

46.8 KB Created: 2020-10-28 03:33:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0f782a2e0f6ba3566a46c3a56de1f2ad SHA-1: 3bd67b37e85ed6e2b05999ad782e9b7cf6e25b24 SHA-256: ed6df3573f12076109f4cb24bb3761152d01cdf01ca17e6cd2a01cd266800ac4
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links, many pointing to disposable hosting, suggesting a link farm designed to distribute traffic to malicious sites. One prominent URL, 'https://gettraff.ru/strik?keyword=mazzogran+100mg+reviews', is flagged as a malicious redirector. The ML classifier strongly indicates maliciousness, and the overall structure points to a phishing or redirection campaign.

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/strik?keyword=mazzogran+100mg+reviews In PDF document text
    • https://xikosenazegan.weebly.com/uploads/1/3/0/7/130739601/bcd88.pdfIn PDF document text
    • https://waratonis.weebly.com/uploads/1/3/4/2/134235653/3608ddac247b53.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/mevubime.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368950/normal_5f89f77f25c95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384323/normal_5f9679c422652.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5f9482d397387.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378836/normal_5f8d809675a49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386335/normal_5f8d20f3d3723.pdfIn PDF document text
    • https://sakuvida.weebly.com/uploads/1/3/0/7/130775714/wuguwas.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/jijawososapuxur-kitirapir.pdfIn PDF document text
    • https://beperiguvo.weebly.com/uploads/1/3/4/3/134320750/gavatoraraz.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/punagilelabon/rasiwiz.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/augsburger_panther_spielplan.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/formulaire_demande_allocation_logement_caf.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/82412102934.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1225/7952/files/kobe_bryant_mamba_mentality_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8418/3220/files/getting_over_stage_fright.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6898/3969/files/666901639.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_off000077db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77DB 5376 bytes
SHA-256: e48b471a24f37b3b172787dd8dd6f121aafabe63fcd16b1b25fd213d2d340c02
font_01_sfnt_off00008a36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A36 10404 bytes
SHA-256: e93340d1de1432a2c523df91402f55774eb1d84f15374ee94650e784827faaff

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