Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8a00a06a74d9fe9…

MALICIOUS

PDF

48.8 KB Created: 2020-10-30 16:03:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: df6f83c71291e9594b8ee40c9186030b SHA-1: dcc15466c74d2a6ac9d955be02c6c638ba673410 SHA-256: d8a00a06a74d9fe9d22062b99913a91c206d2832fabb711e53ee829f536b1f0d
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/aws?keyword=introduction+to+industrial%252Forganizational+psychology+7th+edition+riggio+pdf In PDF document text
    • https://vapipokolodux.weebly.com/uploads/1/3/4/3/134307816/1075470.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415065/normal_5f97eadc266e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367938/normal_5f8f3555df92c.pdfIn PDF document text
    • https://vimadefivikimaw.weebly.com/uploads/1/3/4/2/134265378/1256015.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385422/normal_5f8c9d695a60f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373248/normal_5f8d095097f9b.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://cdn.shopify.com/s/files/1/0504/5433/1571/files/ca_real_id_compliant_drivers_license.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/9601/2450/files/revista_natura_ciclo_12_2020_argentina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1925/3939/files/wheat_ridge_high_school_football.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6637/1495/files/five_factor_model_of_personality.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/6562/7574/files/edexcel_crime_and_punishment_timeline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe414ce0-d672-4ab8-a366-d4b31dc26aa3/11704086721.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_off0000714d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x714D 5504 bytes
SHA-256: f307e4e6ebc69b66adfd9d635adc69cf747002d9e2e139d4583f117148d55d26
font_01_sfnt_off00008414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8414 10176 bytes
SHA-256: 3e7ae1d454b08a3ef37377ab9acfd13ddd25a4ae79ed7590916117adad5e8903
font_02_sfnt_off0000a6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6D7 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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