Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3b7c1e25fa91af…

MALICIOUS

PDF

42.0 KB Created: 2020-08-22 13:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bcd61f299e63e79adc2a7979bfa877c SHA-1: 066d509ee6c1f17806820a0273af3cc1598cc856 SHA-256: 0e3b7c1e25fa91af9985b80389df941797843acb508a5f11d429da0fe9d6d07c
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The PDF contains a large number of embedded URLs, many of which point to Shopify domains hosting other PDF files, indicating a link farm for SEO manipulation or content distribution. One URL, 'https://ttraff.ru/pify?keyword=al+quran+transliterasi+indonesia+pdf', is flagged as a malicious redirector. The 'SE_INVOICE_LURE' heuristic suggests a potential pretext for user interaction, although no direct malicious script execution was observed within this PDF.

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=al+quran+transliterasi+indonesia+pdf
    • http://files.floridagraveyards.org/uploads/1/3/2/6/132681671/vofopa_vovikebub_jimebi.pdf
    • http://files.saxtonsriverdistillery.com/uploads/1/3/1/3/131397938/2ccaaddf0ed9f4b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0659/0104/files/malubapori.pdf
    • https://cdn.shopify.com/s/files/1/0430/4479/8613/files/17927714388.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/bemom.pdf
    • https://cdn.shopify.com/s/files/1/0438/7281/3211/files/celestial_bodies_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kosetomamevisired.pdf
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/61287637759.pdf
    • https://cdn.shopify.com/s/files/1/0433/6173/0718/files/ponanumuvujarerox.pdf
    • https://cdn.shopify.com/s/files/1/0432/5959/2864/files/82563633853.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/1st_edition_player_s_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0436/1981/1490/files/9347097086.pdf
    • https://cdn.shopify.com/s/files/1/0430/8333/3799/files/folder_tree_diagram_template.pdf
    • https://cdn.shopify.com/s/files/1/0439/6492/4062/files/que_es_anestesia_regional.pdf
    • https://cdn.shopify.com/s/files/1/0428/9773/5843/files/mologomuwixoxesosumegerol.pdf
    • https://cdn.shopify.com/s/files/1/0432/8017/1174/files/gugomowe.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_off000066eb.bin
0c16c96cd174fce328257e0883733406f6dc0d72fbeecd52109052b9ad092d1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66EB 5152 bytes
font_01_sfnt_off00007878.bin
c5058c72bc74382c8ee67a79a6024659a2d38fc24488fbee635b3b8b48d96c49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7878 10124 bytes

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