Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f11f03122feeec…

MALICIOUS

PDF

55.5 KB Created: 2020-11-06 01:10:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cbe140f794844014c55506e5de059ac3 SHA-1: e81e8484f77ff5eefc5a725cbcf44dafd38f3ea6 SHA-256: 56f11f03122feeeca651d3816f44716d11333a1bb4dbc9eee9444fa66ba240fa
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that mimics a search engine result for a corporate mission statement, directing users to 'trafffi.ru'. This URL, along with other embedded links to S3 buckets, suggests a link farm or SEO spamming operation. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/strik?keyword=estee+lauder+companies+mission+statement PDF link annotation
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bekalan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f8a2d57f1595.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372361/normal_5f8ac1bbaa907.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/genedonapubefe/zumenitewaxekimigapoze.pdfIn PDF document text
    • https://s3.amazonaws.com/lopazura/photoshop_cs5_crack_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/ludo_apk_old_version.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/how_do_cultural_patterns_affect_communication.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/kegaboxirutuzamara.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/the_stranger_by_albert_camus_download.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/apple_store_grand_central_location.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/25437293565.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000789d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x789D 5176 bytes
SHA-256: 823bf7ef68e3c1952c73137a9622d1bc3787297fa0ed76147e37b3a13611c251
font_01_sfnt_off00008a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A21 11220 bytes
SHA-256: de66020736051309696b5cd2ee171f842d46db402edeeea7fdef44a98b4fb3c1
font_02_sfnt_off0000b0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0A8 19896 bytes
SHA-256: 30a256c354aefe9b66891b38289e1dd4abf62a5f5538d36a0de04bd613769441

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