Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4a69dc7e81ad506…

MALICIOUS

PDF

56.4 KB Created: 2020-08-09 13:22:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c1223ef1e5dc88d0cc5be739238587a8 SHA-1: ed104ca5f686827609ebe2971ea01f52dab867f9 SHA-256: a4a69dc7e81ad50641aa449527b38565cfe38afd56bf75802b87d98823d16790
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.com/pify?keyword=asthma+action+plan+pdf+editable'. This URL is likely part of a phishing or malware distribution chain. The document also exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The ML classifier strongly supports the malicious verdict.

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=asthma+action+plan+pdf+editable In PDF document text
    • http://files.caw.co.nz/uploads/1/3/1/4/131437956/93524b2d.pdfIn PDF document text
    • http://files.shearserenitysalon.com/uploads/1/3/1/3/131383553/53b9878d6b0f11.pdfIn PDF document text
    • http://files.dylanlipke.com/uploads/1/3/2/6/132682070/nokogituwizox_remate_xipuwotesukes.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/1/0428/4104/7206/files/rufagebubefamuzojefejen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6454/0825/files/sonuwobodavonufipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6955/4332/files/65029431757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0860/4829/files/miwox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5023/6064/files/52147741153.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/24700265181.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3912/9751/files/65410830200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0099/5741/files/sifunerevobilepabunoruvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/86212148639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8634/6408/files/54879431113.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5860/9817/files/labalepusatamubobituv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/0574/1989/files/nanostructures_for_antimicrobial_therapy.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 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73FD 13184 bytes
SHA-256: a358f4c691201c37321fe3810529052df6e5d0c9a0f3eca22ca6ab9ea8a38904
font_01_sfnt_off00009e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E81 5428 bytes
SHA-256: ee17ca02e180308b20ea4af52ba1d046ce7feac50ae56813cf7023b6752ac449
font_02_sfnt_off0000b0d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D0 10308 bytes
SHA-256: 3f9e9882dc53812e7010a1c43817d7e38c2d819ed4f68387d46a83206bbe296d

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