Malicious PDF — malware analysis report

Static analysis result for SHA-256 99cda78f7d2203d0…

MALICIOUS

PDF

34.1 KB Created: 2020-08-23 11:25:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fb884bf5fc5532997b38a3c08b821990 SHA-1: e5de17f2dcfa0abb8e83e42bb89e49358e819ae8 SHA-256: 99cda78f7d2203d0e8f1dda3f73e0b6ad8b2df0d0fe14561dc47c543467e5dbc
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a link to a known malicious redirector infrastructure (ttraff.com). Another critical heuristic identified a PDF link farm, with many links pointing to Shopify-hosted PDFs, likely to obscure the malicious redirector or for SEO manipulation. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the extensive link farm and redirector indicate a likely phishing or scam attempt.

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=boson+exam+sim In PDF document text
    • http://files.heroicproducts.net/uploads/1/3/1/3/131379113/30b2ea1a8b8bc3.pdfIn PDF document text
    • http://files.naturalenvironments.net/uploads/1/3/0/7/130738596/512c1f.pdfIn PDF document text
    • http://files.centraltexascreation.com/uploads/1/3/0/9/130970003/3df02e.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/1/0431/6522/1028/files/78551148341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6393/4109/files/bam_bam_song_dj_remix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7047/9766/files/viwanaboxesoganu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2022/1607/files/contract_template_for_marketing_services.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8632/9509/files/fugejedufesabudulamib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0185/6668/files/pobore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/18452518157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7155/3189/files/babuwudeki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6299/2799/files/lamavivesegibasupuragew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9079/5934/files/nebuxogelabosimeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5147/3301/files/scientific_experiment_report_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52733892229.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 6

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_off00004920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4920 4820 bytes
SHA-256: 6c28f80e822d7fb762f6c5b7208f8a522a3730f5c9a18ca8dc413b07c6523ed7
font_01_sfnt_off00005977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5977 10540 bytes
SHA-256: 54a813b8b1fec4cf0f215022d4d95807f7b69983a5ce7b3d8467b83b9a020d31

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