Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8bf291559e3fa9c…

MALICIOUS

PDF

55.8 KB Created: 2020-08-08 20:55:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f87a55612d1ee80bc8bcdb050c8f13e8 SHA-1: 9afd762e4c4d57588567df2581d5073839e639b3 SHA-256: d8bf291559e3fa9c26f9f50898c3274fff612e4a4ac5b575a60058053ee35194
194 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body and extracted URLs reveal a link farm strategy, with numerous links pointing to external PDFs, likely to obscure the ultimate malicious destination. The primary malicious URL identified is https://ttraff.cc/pify?keyword=clinical+examination+pdf.

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=clinical+examination+pdf In PDF document text
    • http://files.joyriderpromotions.com/uploads/1/3/2/6/132695730/tukirome-sanagek.pdfIn PDF document text
    • http://zukomapu.powercutrecords.com/uploads/1/3/1/3/131380213/c89d0ce.pdfIn PDF document text
    • http://files.shenandoahpiper.com/uploads/1/3/1/4/131454523/jebapuxulojurot-ramepelemufakul.pdfIn PDF document text
    • http://files.oace.co/uploads/1/3/1/3/131381781/parotakime.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/1/0430/6731/0231/files/78137140338.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2454/0071/files/69808297303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9892/3427/files/95545705185.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6885/9303/files/gosakijelomubozisagaraxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8812/4829/files/85580311557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4103/7208/files/75818580463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3183/8368/files/mibunemamesuvagibaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6911/2474/files/upsc_topper_answer_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1361/1413/files/chemical_name_for_titin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6269/7894/files/37443207385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8670/7876/files/statistical_analysis_of_chemical_data.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/24456156676.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D96 5000 bytes
SHA-256: 9d1eaf1bd610836298910ff7266885d17c558a00f44ef72438eb57086d82f201
font_01_sfnt_off0000ae90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE90 10572 bytes
SHA-256: 9a8145792050d53b106f47c6658c36df885f3d21d18cf6cd5f71465e96dea139

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