Malicious PDF — malware analysis report

Static analysis result for SHA-256 b36bf8020f8bc5e6…

MALICIOUS

PDF

43.2 KB Created: 2020-08-24 12:06:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f3b9794f64ac3c81a2f547ef375dd85b SHA-1: e7b04358f56e0b9f23877d8cc5fcbead42201c66 SHA-256: b36bf8020f8bc5e64898b8cc060e603742fef028a87663cc99b6b518a0f77823
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and text related to font downloads, suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, including the primary malicious one. The ML classifier strongly indicated maliciousness.

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=abberancy+regular+font+free In PDF document text
    • http://files.littlepeachfeedingandspeech.com/uploads/1/3/1/3/131397987/528559.pdfIn PDF document text
    • http://files.amandaperrucci.com/uploads/1/3/0/9/130970014/wesapezudafedad.pdfIn PDF document text
    • http://files.rdpresets.com/uploads/1/3/0/8/130814258/xifupara.pdfIn PDF document text
    • http://files.londonhouseproducts.com/uploads/1/3/0/9/130969751/bedibonukivud.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/1/0434/4351/9638/files/debt_investments_balance_sheet_classification.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6318/9405/files/captain_america_winter_soldier_4k.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/fubewuzumukatuboxani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8365/3535/files/kojis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1829/5195/files/wosur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5313/8591/files/laroruxexiridopamud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6676/9054/files/catalytic_naphtha_reforming_process.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6982/3390/files/wondershare_editor_kuyhaa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31995481059.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6742/4416/files/13349763758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1427/4720/files/summarizing_and_paraphrasing_exercises_with_answers.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_off00005a1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A1E 5104 bytes
SHA-256: 9037d35407743ff731d7241a527bc678b021e9bda67ad30be2ae45d29536def5
font_01_sfnt_off00006b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B96 16420 bytes
SHA-256: fdf4d640ac7d08699a04a311c3baaef8c7d3d67cd70216dff6e197d462870196

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