Malicious PDF — malware analysis report

Static analysis result for SHA-256 f23f462f3a5e288a…

MALICIOUS

PDF

48.9 KB Created: 2020-08-07 09:50:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7dd9ddcdc13a8e383fd09f61bb610cd3 SHA-1: e12320c3fc6fa15ed6b0aa82a03ffe12e8d2065a SHA-256: f23f462f3a5e288a1089c31c33a40376efebc0b5ec6b5aa1702aed2716b725be
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=adjective+noun+verb+list+pdf'. Additionally, another critical heuristic indicates a PDF link farm with 30 external PDF links, many hosted on Shopify. The document body itself is heavily obfuscated but contains the same redirector URL. This suggests the primary purpose is to lure users to malicious infrastructure via a link farm.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=adjective+noun+verb+list+pdf In PDF document text
    • http://files.westernaustralianshepherdrescue.com/uploads/1/3/2/6/132695679/lujatikok_nonerixalosiku.pdfIn PDF document text
    • http://files.richardson-community-psychology.com/uploads/1/3/0/7/130776255/1499603.pdfIn PDF document text
    • http://files.mpumcbuilders.org/uploads/1/3/1/4/131406403/titazijubo.pdfIn PDF document text
    • http://files.nellkoopmanart.com/uploads/1/3/1/4/131482826/a242aafcc7b156.pdfIn PDF document text
    • http://seramup.liveloudgraphics.com/uploads/1/3/1/6/131606349/wupekugozel_nulesegobip_natexer_xinonefap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2128194791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3640/0037/files/mubiluzafigisemulanuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/difijogumelumot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3033/2070/files/basic_electronics_components_in_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4251/2791/files/dreamweaver_cc_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0912/0152/files/mass_effect_andromeda_walkthrough_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7470/7868/files/rupaul_season_6_torrent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9908973296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7522/3206/files/starbound_navigation_offline.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7106/9594/files/bunumabarevogurew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/6902322603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/retigarapapigowodusu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/wawoxolovov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/convert_to_slope_intercept_form_worksheet.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B23 5084 bytes
SHA-256: c44dea26c07a0f6065fe63ec479be9e4850fa3d01b8001933cf8e776a106890b
font_01_sfnt_off00007c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C76 13912 bytes
SHA-256: 08da7745b2adf21d6d9278c3fb495865fb5c543e5f84357bb435b1f30447773e
font_02_sfnt_off0000a84d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA84D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378