Malicious PDF — malware analysis report

Static analysis result for SHA-256 95d62c3456439969…

MALICIOUS

PDF

38.4 KB Created: 2020-11-05 02:49:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 04d886b7e60e7d9240e7e433c2fa424c SHA-1: d9831e78ca79358b9e2600b04a1066575740ddcd SHA-256: 95d62c3456439969c8618f3aaf19a5f810d100cb093f88ca03ba3165fe19ee48
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • 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=under+armour+strategy+in+2016+case+study In PDF document text
    • https://koworuvixoduto.weebly.com/uploads/1/3/4/3/134352933/jifulovab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f987cf862a60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369138/normal_5f8b124425691.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369514/normal_5f8a50587517e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389797/normal_5f96838bbda26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381098/normal_5f8c1e2277c4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413016/normal_5f9606f8234bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370068/normal_5f99ca186f641.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416923/normal_5f990f7aeef69.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/d2f81d31-5283-469a-8b30-5ac762dbcbbc/climograma_de_bilbao_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/4767/8637/files/38520013788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a51aa5d-db4b-432a-a36a-4b7402bdb547/85797928849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e924f549-c155-49fe-8022-c445e3cf5fa9/trk_kurtulu_sava_bat_cephesi.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_off0000563a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x563A 5800 bytes
SHA-256: 9a11aa29bf0d98ff61a95c1a13f1a7650bb24eb15e055e61d0e2e90cebbf0274
font_01_sfnt_off000069f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69F5 10220 bytes
SHA-256: 5c8eeb6aad725e65e6cfacfb17e194a66c7e859e8099106f379f9d59bc38552f

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