Malicious PDF — malware analysis report

Static analysis result for SHA-256 36117cd09ea446aa…

MALICIOUS

PDF

38.2 KB Created: 2020-08-19 02:27:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0a1a5e93e82f9ce7d7672f25c040830 SHA-1: 826d1766a200f5b91aa4999aebe243aff476daf7 SHA-256: 36117cd09ea446aaa871c9dd206669f48c9ea58c880a0632494f90126f60c754
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to suspicious or unknown domains, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=synonyms+for+informant', which is flagged as a malicious redirector. This indicates the document's primary purpose is to direct users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=synonyms+for+informant
    • http://nigabi.xinzhangdesign.com/uploads/1/3/0/8/130814729/5887eb.pdf
    • http://files.boydssports.ca/uploads/1/3/0/9/130969580/kobisina_tisupap.pdf
    • http://sokowu.bcild.org/uploads/1/3/1/4/131483167/doxotagaxis-basubuzojukiru-daguso-dawumo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6695/files/cambio_de_a_word_online_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0431/7147/9713/files/pakezifomuwifepabonukife.pdf
    • https://cdn.shopify.com/s/files/1/0439/3972/5470/files/95942919108.pdf
    • https://cdn.shopify.com/s/files/1/0439/3956/1630/files/earthworks_brian_aldiss.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/jitiwazowasosobusol.pdf
    • https://cdn.shopify.com/s/files/1/0430/8133/4951/files/forensic_medicine_journal.pdf
    • https://cdn.shopify.com/s/files/1/0431/7590/3383/files/hp_office_pro_8600_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/3604/7522/files/lolotulujuxil.pdf
    • https://cdn.shopify.com/s/files/1/0446/6461/9171/files/music_staff_sheet_printable.pdf
    • https://cdn.shopify.com/s/files/1/0435/9861/0591/files/kuvidapojemomukovitesawe.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_off000056bd.bin
e5b18987b6d293fb158e788e5c7e51ed150c21973626f62acbdf1d597cc32ecc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56BD 5088 bytes
font_01_sfnt_off000067ed.bin
2d7ff1b2bfddc59baf0df67c4f12f69945ac3773f9415972b1b326030d357e29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67ED 10688 bytes

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