Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5ada981c94b93a…

MALICIOUS

PDF

47.6 KB Created: 2020-10-31 05:55:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bfe6c9ab21412450c57e78afd6021d8 SHA-1: 5391655abeac1ce71568ff11ce72b495851cb54c SHA-256: 2e5ada981c94b93a072606fc60bdf0caaf6c57f90c989965ead99f308b6d43d9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and contains numerous embedded links, many pointing to redirector infrastructure. The heuristic PDF_SEO_LINK_FARM indicates a link farm, suggesting the document's primary purpose is to direct users to external, potentially malicious, websites. The presence of a known malicious redirector URL further supports this assessment.

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://ttraff.ru/123?keyword=d%2526d+combat+bonus+actions
    • https://pojosividadom.weebly.com/uploads/1/3/4/5/134524524/264559.pdf
    • https://rojusonevupa.weebly.com/uploads/1/3/0/8/130814232/6287953.pdf
    • https://vuguzunorofina.weebly.com/uploads/1/3/4/3/134322364/zasof.pdf
    • https://wedebiki.weebly.com/uploads/1/3/0/9/130969436/legemome.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/fefetimutalojak_zaxanolopafimi_ditikifuge.pdf
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/gikixurijajakovos.pdf
    • https://kabudededawizo.weebly.com/uploads/1/3/1/3/131383409/jibovesar.pdf
    • https://xumabilere.weebly.com/uploads/1/3/1/1/131163638/dojigedijiresi_degakasara.pdf
    • https://rezivunafotete.weebly.com/uploads/1/3/4/3/134354631/483893.pdf
    • https://cdn-cms.f-static.net/uploads/4418981/normal_5f979c2b6f3be.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9207/3895/files/4891887472.pdf
    • https://cdn.shopify.com/s/files/1/0483/0828/9699/files/nelekalubojaregenikawisa.pdf
    • https://cdn.shopify.com/s/files/1/0504/1006/2012/files/donde_estas_corazon_lyrics.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_off000076ed.bin
d46272a35c141788e45a942f60d3ac75eba256168db5716376ff56f0f84bb3df
pdf-font-stream PDF embedded font (sfnt) at offset 0x76ED 4156 bytes
font_01_sfnt_off0000851b.bin
0b07121d342d7d0b9e954999a6289d902b1defd750a03245be0d318054e390c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x851B 15536 bytes