Malicious PDF — malware analysis report

Static analysis result for SHA-256 222ef7f473bef1f6…

MALICIOUS

PDF

45.6 KB Created: 2020-08-11 09:12:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec5ba0517c8630994db7f48582bd7c1f SHA-1: da24d7c467696a70fe56c9adc2bf00c04e73c0b7 SHA-256: 222ef7f473bef1f6afc09733ae67cb494cfe7926734e0a2d58bf1d6ca24236ca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, with one prominently pointing to a known malicious redirector at 'https://ttraff.com/pify?keyword=sistema+capitalista+caracteristicas+pdf'. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify-hosted PDFs, suggesting a link farm or redirection strategy. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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.com/pify?keyword=sistema+capitalista+caracteristicas+pdf
    • http://files.crrsingapore.com/uploads/1/3/0/9/130969897/misupemuwajime-xavisuruw-jurizebew-toxisipujodu.pdf
    • http://files.amartsandcrafts.com/uploads/1/3/0/7/130776158/4515ddfd3e.pdf
    • http://files.stpaulsboxhillfish.com/uploads/1/3/1/4/131454850/wogubunozevefofunu.pdf
    • http://zudabox.innovativefinancialresults.com/uploads/1/3/1/4/131408100/1084049.pdf
    • http://files.imaginesew.com/uploads/1/3/0/7/130738991/8b76f4c13fd4e6.pdf
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/95457091472.pdf
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/63057052955.pdf
    • https://cdn.shopify.com/s/files/1/0438/4214/2358/files/aime_cesaire_poems.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/vibugobugijurutuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/0354/3715/files/5106482540.pdf
    • https://cdn.shopify.com/s/files/1/0437/4937/6161/files/comment_fusionner_2_en_un_seul_document.pdf
    • https://cdn.shopify.com/s/files/1/0433/3636/8296/files/28677220394.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/counting_worksheets_for_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0429/0124/2022/files/54941832104.pdf
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/ac_and_dc_power_supply.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/peruzusomexoxawig.pdf
    • https://cdn.shopify.com/s/files/1/0437/5419/3047/files/multiplication_table_worksheet_grade_2.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074c3.bin
33a0be363e59baf6c6d83d2f323d01ea411e74aa4b605be7e51ed16ba1163e4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74C3 5404 bytes
font_01_sfnt_off000086fc.bin
1f44942271bc221a0dd49a241c80af1421fdeca95e87620c56f2780b26e75939		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86FC 10552 bytes

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