Malicious PDF — malware analysis report

Static analysis result for SHA-256 611da5e9a2443156…

MALICIOUS

PDF

44.0 KB Created: 2020-08-27 21:23:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ec8d306d7177215149f1aac7a6b41413 SHA-1: b4a7f4a301a14b431795655303737fcbccf5222b SHA-256: 611da5e9a2443156cbbcb6a0288c9ead7be15d70cf591cebbca748db254ea6d6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a link farm and a redirector URL, indicating a phishing or scam attempt disguised as a coloring page. The ML classifier strongly flagged this PDF as malicious, and the embedded URL points to a known malicious redirector. The document body itself is heavily obfuscated and contains the malicious URL.

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=aparato+reproductor+femenino+para+colorear+con+nombres In PDF document text
    • http://files.boondhs.com/uploads/1/3/0/7/130738710/7385224.pdfIn PDF document text
    • http://welodak.generationxgoesglobal.com/uploads/1/3/2/6/132695643/jofepoxidoma_sogekomumu_ludeliz_vuroju.pdfIn PDF document text
    • http://files.djmoosetrax.com/uploads/1/3/1/4/131483440/fuboguvasuk.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/1/0459/9382/0327/files/wivozezoduxafunomojuvidus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4346/1032/files/2012_audi_a6_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6912/0413/files/atm_program_in_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5331/7272/files/vepomowenetosivawitegime.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5896/1315/files/pifetasusikekebul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1241/5897/files/formacion_de_enlaces_quimicos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8495/5300/files/keraxubelixif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7641/8722/files/89409019777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7147/0742/files/fosekibibexafewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9903/7595/files/womonane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1030/7749/files/veganismo_libros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/99665879080.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_off00006a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A21 5432 bytes
SHA-256: dca2f8bac9cc91ddac91d168ca7ca9d84929813471bd87942d15305909827f62
font_01_sfnt_off00007c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C74 11292 bytes
SHA-256: 924a521facf94cb9e976466d05aae2dc4add8a33eed4fdad75c2475ba008ea98

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