Malicious PDF — malware analysis report

Static analysis result for SHA-256 228004a9e5266e21…

MALICIOUS

PDF

44.4 KB Created: 2020-07-25 18:40:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f50f4eaf9c0b539a5d90bf138bc5ba26 SHA-1: 8b79533d12a627a8e403edf6e3085be8793da123 SHA-256: 228004a9e5266e21b4ae3ca4cca6a586825cdcaf1025e1cc6e2019bf0249afe1
194 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a large number of embedded links, including one pointing to a known malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a mass external PDF link farm, with the primary URL being a redirector. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious classification. The document body is heavily obfuscated and unreadable, but the presence of numerous links suggests a phishing or malware distribution attempt.

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=quote+template+travel+agency In PDF document text
    • http://files.conservatorappliances.com/uploads/1/3/0/7/130740221/3437078.pdfIn PDF document text
    • http://files.renattaazzam.com/uploads/1/3/1/6/131636562/mubanuwibidutuz_bubifuref_sumevo.pdfIn PDF document text
    • http://files.whitefishtherapy.com/uploads/1/3/0/9/130969424/fobenetuweg_sivumew_vozimaxonuxala.pdfIn PDF document text
    • http://files.sagemamadoula.com/uploads/1/3/0/9/130969428/5291829.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/1/0432/4225/8587/files/72063936968.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5012/3943/files/19540140775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4567/4389/files/bewenebukomuzavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8511/0175/files/74163142965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5221/2130/files/81289776879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4275/9071/files/bapikebes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7301/9808/files/wiforosepabuno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/gomepimemunotoxogurug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/89622730984.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6578/6006/files/57321076628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5467/7662/files/duzosizoriwigovazazafug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/82796207535.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_off0000727c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x727C 5132 bytes
SHA-256: d53f4864914c30bc265d70e76ecf46b4c553631969dec12d86955d79ac5eecea
font_01_sfnt_off000083e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83E6 9616 bytes
SHA-256: 27d483c1cd81a22528a60a6e197764dd3073e38275f58131d0eed8948aa4e44b

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