Malicious PDF — malware analysis report

Static analysis result for SHA-256 714e040f764b25f6…

MALICIOUS

PDF

47.3 KB Created: 2020-09-01 07:23:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 177a692f88c12aa6c0f9284fe6cceafd SHA-1: b05c69cf5b8d97bda8918b184b3cf5fbbe89d612 SHA-256: 714e040f764b25f61b46091f1d1a34f5fac19759bab943ec0a0d5aad75d38982
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The heuristic PDF_SEO_LINK_FARM suggests this PDF is part of a larger link farm, likely for SEO manipulation or distributing malicious links. The ML classifier strongly flags this PDF as malicious, supporting the conclusion that it is designed to compromise users.

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.cc/pify?keyword=dry+training+for+freediving+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_04bdddd48700441bb53d7274cfbef8dd.pdf
    • https://static.usrfiles.com/ugd/b8c837_bce76958acca4ee8b33d930e28c5ea4c.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_b6380f2b63eb48dd80e5bf566dca3f78.pdf
    • https://cdn.shopify.com/s/files/1/0435/9582/5320/files/birokazosixilajokusaxeguv.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/wobisaperizomovepo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4339/6506/files/dixalinalevulajavaf.pdf
    • https://cdn.shopify.com/s/files/1/0439/0807/1576/files/sixaxakej.pdf
    • https://cdn.shopify.com/s/files/1/0435/0273/1430/files/67056036907.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40369191557.pdf
    • https://cdn.shopify.com/s/files/1/0439/2773/2379/files/ask_and_answer_questions_worksheets_3rd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0428/1060/5735/files/rutoro.pdf
    • https://cdn.shopify.com/s/files/1/0435/4434/6792/files/south_carolina_alligator_hunting_guides.pdf
    • https://cdn.shopify.com/s/files/1/0435/2878/1988/files/nirvana_sappy_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0438/5295/5810/files/design_all_star_cheer_uniforms_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/2724/2903/files/wirevilejekepigafabozo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6074/8695/files/widavigegal.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_off00007b7c.bin
34b4012b169ae7a4ac26c26ef73fdbc6f92cd5805b7d7f09f64dc7d77c65f91f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7C 5160 bytes
font_01_sfnt_off00008d3b.bin
0edf50a831e33630e8c0ab7c8741bd1979f37ee5e0b69b7c176ca5cb4ec0cb6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D3B 10320 bytes

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