Malicious PDF — malware analysis report

Static analysis result for SHA-256 40a7f7d518fbaf75…

MALICIOUS

PDF

33.6 KB Created: 2020-08-23 21:14:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ee1c0118e67581877c6de1e1763704b0 SHA-1: 8c7a287633a884c1a717cd566a36e23a2b2ec90a SHA-256: 40a7f7d518fbaf75ae79ff1135970f41fc334f7676211ac8ff7f838355ccc27d
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a string that appears to be a lure for 'Chuck season 1 full' and includes the malicious redirector URL. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious content.

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=chuck+season+1+full In PDF document text
    • http://files.802beancompany.com/uploads/1/3/2/6/132695476/nadomonoti-kamutosa.pdfIn PDF document text
    • http://files.whitemouthriverrec.com/uploads/1/3/1/0/131071037/disaz.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/1/0429/2512/9891/files/kuvalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3899/7669/files/mivexosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5552/0673/files/registro_anecdotico_ejemplo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9330/2178/files/wiwujife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8028/5348/files/bulking_diet_plan_for_skinny_guys.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0896/6307/files/35590910141.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1390/5311/files/in_between_the_sheets_remix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/2988/3048/files/pdf_para_colorear_paw_patrol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2670/8640/files/pdf_cardiologia_pediatrica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1744/4264/files/g_shock_ga_100_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/45646026002.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 2

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_off00004807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4807 4892 bytes
SHA-256: 87df92d206bdd12b49383e2e6dd9530ee961af93070d3be3d1857207536cf715
font_01_sfnt_off000058af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58AF 9680 bytes
SHA-256: e56b94cbc281d9f5f4bcc8abf52c66c8b1844b21f13dd8d60b2fd1c00a13aad1

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