Malicious PDF — malware analysis report

Static analysis result for SHA-256 408c5c7cd5ce5bea…

MALICIOUS

PDF

50.6 KB Created: 2020-08-10 02:28:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f822e1f90a5eae68d959061b9f5ef3e5 SHA-1: cf4fa337e85710e6ead3a77a57f40aedb4c113c2 SHA-256: 408c5c7cd5ce5beaeea59808a3a4fa154ccde70f7ea78135be43f5454ea79496
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=algorithme+arbre+pdf' which is a known malicious redirector. This suggests the document's primary purpose is to lure users to malicious sites.

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=algorithme+arbre+pdf In PDF document text
    • http://files.nightsongpettingzoo.com/uploads/1/3/1/6/131606121/zegodikaxa.pdfIn PDF document text
    • http://files.delaneydrywall.com/uploads/1/3/0/7/130776542/gukameluzoro.pdfIn PDF document text
    • http://files.perrywoodard.com/uploads/1/3/1/3/131379844/kodutunifasizej_tepesebelajewa.pdfIn PDF document text
    • http://files.dorsetheartdoctor.com/uploads/1/3/0/7/130775759/torijinizekow-jiravigazuf-zulukabolopud-pufoziwiguluz.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/1/0435/3789/1480/files/39411381435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0151/1068/files/talos_principle_b4_star.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/44075178727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7519/9391/files/75535227105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0423/0805/files/8301526171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6369/5770/files/tezawabekoxoliwix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5335/0053/files/2016_subaru_outback_owner_s_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5016/2583/files/libro_balun_canan_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99203043279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6904/5926/files/fubusowakaxuwisomit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8841/8718/files/sobifipupisosakel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6091/9446/files/tenureme.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_off0000795c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x795C 5408 bytes
SHA-256: a076cef495298180ad415ed3912a262ae32c9e0a3cb6026ad6866c8c5b8734bf
font_01_sfnt_off00008b8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8E 16364 bytes
SHA-256: 4d3b795e1d3138a587178f8b23d27320e28d59cb6d03f6337d04cdcb243a73c1

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