Malicious PDF — malware analysis report

Static analysis result for SHA-256 6939426694223017…

MALICIOUS

PDF

44.6 KB Created: 2020-08-11 13:23:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ff8d1f434aa4d231bc3e8f40a878aa5 SHA-1: b562b38c4a0301a2f84b78fda7a4024f091dc8b0 SHA-256: 6939426694223017c9a40a52c42f3e859bb96e34e94d727940c550187b1b8c82
162 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to 'Nafta certificate of origin canada pdf'. The presence of numerous external PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/pify?keyword=nafta+certificate+of+origin+canada+pdf
    • http://dowifu.solutions-guides.com/uploads/1/3/2/3/132302780/2316201.pdf
    • http://files.eswanton.com/uploads/1/3/1/4/131454523/bibedu.pdf
    • http://rukevu.rescuedessentials.ca/uploads/1/3/0/7/130775732/jogobumu.pdf
    • http://gezam.gekkonidazed.com/uploads/1/3/2/8/132814930/8766438.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/65126393787.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/61552247481.pdf
    • https://cdn.shopify.com/s/files/1/0431/2544/0669/files/wofomugukinuvurori.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5675/files/besoxelifutazusimidax.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/bixi_map.pdf
    • https://cdn.shopify.com/s/files/1/0437/4714/7928/files/bajaj_allianz_car_insurance.pdf
    • https://cdn.shopify.com/s/files/1/0439/7904/7070/files/nixaxubitapabirob.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2337/files/artist_management_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0436/1935/2739/files/bachianas_brasileiras_5_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/apostle_joshua_selman_messages.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8765/files/3115369317.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/faletamu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0243/7527/files/borawezaratonuvuzugefaw.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_off00006f9b.bin
f7f3e5d28adc1b3d3b618c40ba2b8b5d35537d67420e997d9eae06bbff27d72f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9B 5080 bytes
font_01_sfnt_off000080f1.bin
b88ee9bd9f86a51d63bd3186aba6c821b4bff9018e3d301e8d9bcd011872444a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80F1 10672 bytes

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