Malicious PDF — malware analysis report

Static analysis result for SHA-256 41c72c3dd686fa77…

MALICIOUS

PDF

43.2 KB Created: 2020-08-06 04:57:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6cd8d246678ab135df77cbb0b81f2c23 SHA-1: 2fe6588d18e5cde633fdc48a7eaf9005788e89c9 SHA-256: 41c72c3dd686fa77e81e47141424cd0bf23b0dc4fc4755a45a4b6bb4fd114d3f
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, https://ttraff.ru/pify?keyword=reutilizacion+de+residuos+organicos+pdf, is flagged as a known malicious redirector. The presence of a link farm and a malicious redirector strongly suggests an attempt to lure users to malicious sites, likely for phishing or malware delivery.

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.ru/pify?keyword=reutilizacion+de+residuos+organicos+pdf In PDF document text
    • http://files.emilytodt.com/uploads/1/3/0/8/130873718/zojiwo.pdfIn PDF document text
    • http://files.labcharter-pto.com/uploads/1/3/1/3/131379434/4b32ad6.pdfIn PDF document text
    • http://files.shueyvillechurch.org/uploads/1/3/1/4/131437308/7922178.pdfIn PDF document text
    • http://files.draincareseptic.com/uploads/1/3/0/8/130874300/denagasexomofa.pdfIn PDF document text
    • http://gagijo.beatrizgonzalezmusic.com/uploads/1/3/0/8/130874359/76fd4.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/1/0433/2696/3865/files/79420250431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78539107281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0164/2149/files/fazoxed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/3571323549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98012128422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/vefubuwadakubul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7140/6241/files/36223079298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6302/4542/files/67659155926.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5657/9228/files/57185585527.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9113/2567/files/blazer_express_32.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1264/4251/files/cbi_medical_abbreviation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2051/5488/files/alopecias_no_cicatriciales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0605/7888/files/rogetazoferalumusi.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_off000066ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66AD 5380 bytes
SHA-256: 9cdb5045e7a2476493bcbee9b044a824702c26a940d6831a894a5d775c5d910c
font_01_sfnt_off00007918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7918 11424 bytes
SHA-256: dc292448e72142aa7b05e722cd07b8e0cba65b0a4f7e4a3d6a856332742b1009

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