Malicious PDF — malware analysis report

Static analysis result for SHA-256 a714abbacce39b7b…

MALICIOUS

PDF

132.5 KB Created: 2020-10-28 23:22:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 37b8ef060f1ceb052a16d054c84884fd SHA-1: 78c3dc87ef7bc845cbe5c9f1c019b6cf49ed8262 SHA-256: a714abbacce39b7b3545a88e4d604b4f1beacb7794eccd84349e6f37cfded232
184 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to disposable hosting or known redirectors, indicating a link farm designed to manipulate search engine results or distribute malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link further supports its malicious intent. No scripts were extracted, but the structure suggests a malicious document intended to lure users to external sites.

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/aws?keyword=persona+3+strategy+guide+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4386361/normal_5f9767e25c3b6.pdfIn PDF document text
    • https://velabusodogir.weebly.com/uploads/1/3/1/8/131858366/1427189.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369323/normal_5f8e0f99846d2.pdfIn PDF document text
    • https://giruveme.weebly.com/uploads/1/3/4/4/134480937/vizubazeb.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/1463696.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406776/normal_5f968858b3dca.pdfIn PDF document text
    • https://tidoxanarapora.weebly.com/uploads/1/3/2/7/132710787/sozomam-sonewutigut-dotaganol.pdfIn PDF document text
    • https://bevugatumuga.weebly.com/uploads/1/3/4/3/134316863/vopiraf-jalipejobuna-vajinuwo-xapekevino.pdfIn PDF document text
    • https://sonilotosoj.weebly.com/uploads/1/3/1/3/131379329/fobamafuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f880a0dbc581.pdfIn PDF document text
    • https://vixeroniwemeful.weebly.com/uploads/1/3/0/7/130740086/5536424.pdfIn PDF document text
    • https://kegilosibumu.weebly.com/uploads/1/3/4/5/134513635/d74c724d.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/kezedivalo-bolumukejufufik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_5f8b4f0616e2d.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/4135560.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369794/normal_5f937ef6c1511.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/tevigotu/boloso.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/qualities_of_good_research_problem.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/kujubipaveju.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/electrical_rough_in_inspection_checklist.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_off0001be9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE9F 3556 bytes
SHA-256: 0ac348ef7220a8753fc0cb7091dc5ec94cbed2bde8e8858673f9cdccf9e7acfe
font_01_sfnt_off0001cb53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB53 5444 bytes
SHA-256: 09bb5609e5a619b7934e25b20aab1a647882bb28d09c53c0fcb72039b7d7a6fb
font_02_sfnt_off0001ddef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DDEF 10988 bytes
SHA-256: d457a0000b94b6d029e152b5a57e6495acdce65a572a4b9951b58f0113c1e894