Malicious PDF — malware analysis report

Static analysis result for SHA-256 274e7ce2eb03ac72…

MALICIOUS

PDF

42.0 KB Created: 2020-11-05 01:17:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 944380bf9fb18b7ada845310c504870f SHA-1: 533c62071f183e31a25115e48357951ce199e48e SHA-256: 274e7ce2eb03ac72930e4bc6cea5e01d8782f95a1ac908e9079a73d82a27e3db
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://cctraff.ru/strik?keyword=billboard+top+100+albums+2020 In PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/9499402.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381102/normal_5fa32dd5af89f.pdfIn PDF document text
    • https://kijadixuzot.weebly.com/uploads/1/3/4/5/134585523/womufozixope.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/746f8b3d-b24c-4469-8feb-006e867dd55a/30_gal_air_compressor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1971a4a-2980-4f7e-ac72-a92c4f6e47c7/8365823841.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/46516654948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9252bd7f-3384-434c-8f82-668a65dcfeb1/bazilelokopusukitem.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/land_before_time_petrie_yep_yep_yep.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/sefidowigixum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3949a51f-f064-43cd-aa20-de290abb3e60/wunesofezopowirovojeto.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_off000057b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57B5 5280 bytes
SHA-256: 574cb232f7236cff07560ea1dd42e36a19e539e18e3706f04c1dcd6d35cd08e7
font_01_sfnt_off00006993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6993 10932 bytes
SHA-256: 6b21c856c7251f674aadf085decc1df54afc1746d9a63f673fce72e554ce8fc7
font_02_sfnt_off00008da7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA7 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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