Malicious PDF — malware analysis report

Static analysis result for SHA-256 a588c20d17bb9519…

MALICIOUS

PDF

35.2 KB Created: 2020-08-12 16:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 15ab29aa2a1a36cfa54a06ac1e86d127 SHA-1: 24351332acacef0bfd8832aad215a388e033ed65 SHA-256: a588c20d17bb9519f63631be3ba7b87031247ee539096613d1af0a7861f100ed
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to create a link farm, with a primary redirector pointing to malicious infrastructure. The document body itself contains obfuscated text and embedded URLs, including a primary malicious redirector. The ML classifier also strongly indicated maliciousness.

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=o+estado+absolutista+no+ocidente+pdf In PDF document text
    • http://watuketi.decisivemomentsph.com/uploads/1/3/1/4/131453540/113263.pdfIn PDF document text
    • http://files.usasubs.com/uploads/1/3/1/4/131438778/2f1ff94df989ca.pdfIn PDF document text
    • http://files.alexaelizabethdesign.com/uploads/1/3/0/8/130874018/revekono.pdfIn PDF document text
    • http://files.designsoncraft.co.uk/uploads/1/3/0/8/130813330/vopuwasakemen.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/1/0429/8542/2997/files/xudasodigewusosugaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6413/9669/files/after_book_read_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9176/3105/files/kudomisuwobupabitopefajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4954/2047/files/ropufipirugata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/solebudoxoribojurumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6352/5026/files/dobarevodubutobozuget.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/boses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejukimuvili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/laissez_faire_leadership_style_advantages_and_disadvantages.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4451/1645/files/42446271737.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2964/0854/files/panera_bread_allergen_menu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/79500400662.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/lavavuxulebixeverez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/wanegoxifimagidobomudas.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_off00004a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A71 5220 bytes
SHA-256: 8e8935b5c2436f0b3f9c279199aadeb8ae1d3619ecea45138d3a830201b9a787
font_01_sfnt_off00005c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3E 11436 bytes
SHA-256: d688fe3da40dab9cf74b60320ce10c62636522e1ff8662cbf2381687c825b32e

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