Malicious PDF — malware analysis report

Static analysis result for SHA-256 66524dd76793c9ff…

MALICIOUS

PDF

44.2 KB Created: 2020-08-25 03:42:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eed3ea3bdf5195d20a957015029df8ee SHA-1: 94087ed9de548fc2c5122a786a7aa71cd1abd3fa SHA-256: 66524dd76793c9ff8bcfcca8a509d94585b8575af49c559a2c9c59c7f29a724b
194 Risk Score

Malware Insights

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

The PDF contains a lure to 'Acceder a fotos icloud desde android' and embeds numerous links, including one to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests an attempt to distribute malicious content or engage in SEO manipulation for phishing. The document body itself is heavily obfuscated but contains the primary lure URL.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.cc/pify?keyword=acceder+a+fotos+icloud+desde+android
    • http://files.journeystoflavors.com/uploads/1/3/0/9/130969555/a18860d033.pdf
    • http://files.applied-magnetics-shop.com/uploads/1/3/2/8/132815220/be05f.pdf
    • http://rogeniku.dragongoldcup2020.com/uploads/1/3/1/4/131412032/5743773355662.pdf
    • http://files.malcolmdeweyfineart.com/uploads/1/3/1/6/131636954/zivovasumutom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/ganawodelamodebo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6928/files/a_wrinkle_in_time_chapter_1_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/5884/0223/files/fajalufurigatabikuliso.pdf
    • https://cdn.shopify.com/s/files/1/0460/1407/0945/files/descending_order_of_rational_numbers_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5479/files/muse_butterflies_and_hurricanes_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/8476/7641/files/kitazenixebabawefolivos.pdf
    • https://cdn.shopify.com/s/files/1/0432/3177/2835/files/saririkugilukogetikolav.pdf
    • https://cdn.shopify.com/s/files/1/0435/6318/8383/files/komatex_foamed_pvc_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/3823/6062/files/morgana_build_support.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9069/files/dakufimaten.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/dotupuzutenorajole.pdf
    • https://cdn.shopify.com/s/files/1/0433/1683/8558/files/93122210848.pdf
    • https://cdn.shopify.com/s/files/1/0432/1935/3767/files/38229439775.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2860038855.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_off00006bd9.bin
882dff805036e5770ae76136800e3c0b0dd85a10925f81b8631293fd4c9c51f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD9 5004 bytes
font_01_sfnt_off00007cdd.bin
4283426e551fdb52e34d4211b413f0c717c23819f4fe43f2ee57373397a338ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDD 11356 bytes

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