Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6e009180254c189…

MALICIOUS

PDF

37.7 KB Created: 2020-10-31 12:10:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd560c68cd9276620d44b7c007679835 SHA-1: 74f343ddf07cfea32d175526c2dbcdc4646eef7c SHA-256: e6e009180254c1898a0388408fdac0e707a0c22248e0e379df07e795dece56dd
154 Risk Score

Malware Insights

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

This PDF document contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The document also hosts a large number of external PDF links, suggesting it is part of a link farm designed to manipulate search engine results. The embedded URLs and the ML classifier strongly indicate malicious intent.

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=ashley+furniture+mn+woodbury
    • https://cdn-cms.f-static.net/uploads/4388048/normal_5f8e6c2d01acc.pdf
    • https://cdn-cms.f-static.net/uploads/4368954/normal_5f88677b9a330.pdf
    • https://dofazodasi.weebly.com/uploads/1/3/0/8/130873943/gikover-wepasomasopumo.pdf
    • https://cdn-cms.f-static.net/uploads/4417519/normal_5f9c528b54667.pdf
    • https://cdn-cms.f-static.net/uploads/4367642/normal_5f9332b04f37c.pdf
    • https://cdn-cms.f-static.net/uploads/4371244/normal_5f9599f650aef.pdf
    • https://dikanutedageke.weebly.com/uploads/1/3/4/4/134457663/b4442bc0ccf9b.pdf
    • https://cdn-cms.f-static.net/uploads/4413969/normal_5f99cfd39626c.pdf
    • https://cdn-cms.f-static.net/uploads/4385848/normal_5f97d0072224b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b6488e8b-9ce9-4bda-9808-7b910aef2177/nana_mobile_legends.pdf
    • https://uploads.strikinglycdn.com/files/3dc66260-8129-4562-831a-52e7dea5f0fd/tazatiso.pdf
    • https://s3.amazonaws.com/somamere/personal_service_corporation_s-corp.pdf
    • https://uploads.strikinglycdn.com/files/cbbc0231-126d-442e-9fed-b9c00da0d0dd/40241722780.pdf
    • https://uploads.strikinglycdn.com/files/3518f355-9122-4182-9a24-24c074453a53/solovuk.pdf
    • https://s3.amazonaws.com/sugosubexez/la_llama_doble.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053f0.bin
41f216b0d6d8064d376e9afb023800add047734388287626bc21d064f5416a13
pdf-font-stream PDF embedded font (sfnt) at offset 0x53F0 5260 bytes
font_01_sfnt_off000065c2.bin
aaad122472e7b4af478ece399b61ade99ec5683285c12827e52b50d4cf2901a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x65C2 10872 bytes