Malicious PDF — malware analysis report

Static analysis result for SHA-256 0560d17f3728e774…

MALICIOUS

PDF

101.2 KB Created: 2020-08-25 21:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdfb5e6e0fbd4af004960f6b7b45ba9a SHA-1: c823b27bf0422162f50a8ba30b35270280713494 SHA-256: 0560d17f3728e77445eb06d1ce34414e0acc3d78774c271d89546aeeb81ddbab
154 Risk Score

Malware Insights

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

The PDF contains a heuristic match for malicious redirector links, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious destination. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.ru/pify?keyword=tipos+de+intercambiadores+de+calor+de+doble+tubo
    • http://files.walk-cards.com/uploads/1/3/1/3/131398253/kilapozofotede.pdf
    • http://gorikijir.petitepetalsbyflo.com/uploads/1/3/0/7/130775118/66b4867.pdf
    • http://files.declanwrynn.com/uploads/1/3/0/9/130969169/dupaf.pdf
    • http://bigila.fencingaberdeen.com/uploads/1/3/0/8/130814295/3159164.pdf
    • http://ralunobi.rossmckitrick.com/uploads/1/3/1/4/131406798/116153.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/pa_school_immunization_law_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/5389/1232/files/spongebob_credits_song.pdf
    • https://cdn.shopify.com/s/files/1/0434/1871/4264/files/baazigar_audio_song_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/4761/5649/files/reggaeton_music_downloads.pdf
    • https://cdn.shopify.com/s/files/1/0432/7001/3086/files/demitunutopedazax.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/chicago_traffic_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/9604/7783/files/tafabidetemuxeretaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/1392/1175/files/weider_ruthless_workout_calendar.pdf
    • https://cdn.shopify.com/s/files/1/0437/7745/8334/files/bsc_1st_year_inorganic_chemistry_notes_download.pdf
    • https://cdn.shopify.com/s/files/1/0448/9543/6955/files/list_of_prescription_abbreviations.pdf
    • https://cdn.shopify.com/s/files/1/0431/1541/3661/files/3d_printer_model_file_formats.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_off000147ac.bin
6b5ac3e236394f152296e7abe66ef1517f71c9e482ecd8eedb79a88c385c1ee7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x147AC 5308 bytes
font_01_sfnt_off00015990.bin
40983243a4f1712732f65c318942a624bbe6ec53ab0664559f4146f5de6733e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15990 14748 bytes

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