Malicious PDF — malware analysis report

Static analysis result for SHA-256 16baef8d461b4dec…

MALICIOUS

PDF

64.4 KB Created: 2020-08-08 09:22:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f05d9f08a269a07fceb803a7c8c864f6 SHA-1: ce8b45177641cac32d08e41e0ed02d6c3c3d0cae SHA-256: 16baef8d461b4dec36c0fe98016f98bedd3a55a29f00a8df2e871aba4da32d85
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to a link farm designed to manipulate search engine results. One primary redirector URL, https://ttraff.com/pify?keyword=brainstorming+definition+pdf, is repeatedly referenced, indicating a strong attempt to drive traffic to a malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=brainstorming+definition+pdf In PDF document text
    • http://tixuwe.multipleconstruction.com/uploads/1/3/1/8/131856772/zaket.pdfIn PDF document text
    • http://files.haulksmaple.com/uploads/1/3/1/4/131454620/pebivowus.pdfIn PDF document text
    • http://gobamefo.daddysmoneymarketgoats.com/uploads/1/3/1/6/131637136/8c8d82b3e7b87.pdfIn PDF document text
    • http://gudob.pittsburghrunner.com/uploads/1/3/2/6/132683014/suxiposadanasevesiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9032/2335/files/lokefixir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5901/9927/files/92900502025.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7857/3464/files/56892182267.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4173/3273/files/60468172497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3685/1874/files/95262384747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7102/0954/files/fupalupasub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/business_communication_essentials_6th_edition_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3320/6690/files/44301920492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexidemunuviviradepinitim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4352/0666/files/68820713859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6869/3411/files/kobisupubemoti.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE6E 5380 bytes
SHA-256: 67c142c307eb7f7e35d89c0a30261048e20a7869e819cb9af266284ad874acda
font_01_sfnt_off0000d0a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A7 10488 bytes
SHA-256: 66fd848b7f0e8acb49c1000b09f0d89273426bfae102a86eb4459c7ae9dfb965

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