Malicious PDF — malware analysis report

Static analysis result for SHA-256 518e4f5ac19e3cf3…

MALICIOUS

PDF

41.4 KB Created: 2020-08-07 07:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8848ce225bde5c07695a53b1c89183a4 SHA-1: 4dd443700e3b800481fbf9cfc2d181b81fb6931e SHA-256: 518e4f5ac19e3cf3c89ff97a0090d9ceb4dfcf58d5757ea1cc05b1d5579a139d
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains the same URL, reinforcing its role as a lure. No scripts were extracted from this sample.

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=agile+methodology+tutorial+for+beginners+pdf In PDF document text
    • http://fubep.relaxedmindtaichi.com/uploads/1/3/1/1/131164243/bokuxosigit_dabelodasemew.pdfIn PDF document text
    • http://files.willparkermusic.com/uploads/1/3/1/3/131398533/kuxonozezezowijegod.pdfIn PDF document text
    • http://files.singaporenv.com/uploads/1/3/2/6/132681767/0cd51dd.pdfIn PDF document text
    • http://bewaguwu.artfulscents.com/uploads/1/3/2/7/132740214/jipoponaz.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/1/0427/3537/0407/files/tusedajasumananalevodev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/senasidezididedo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0521/3854/files/fuxavopusoguxik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0579/5752/files/atama_no_taisou.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2670/2758/files/50331608213.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4343/8244/files/relejeneres.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6295/1074/files/28788728346.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0011/1009/files/61860181707.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/luleteremise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nanejixiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6283/4853/files/lumujavujugumutowakekami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/dadotunekasifux.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_off000061b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B5 5688 bytes
SHA-256: ac328e55d265881bcdeacd017f5c59eca68a8f64a42abfa34f3de6db68cc3818
font_01_sfnt_off000074e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74E9 10456 bytes
SHA-256: bc5b17d99ebbcbf325a3386e6f66b4328f52cb1cd6af140b63c60f26436fa17f

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