Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e08b4915519f803…

MALICIOUS

PDF

44.0 KB Created: 2020-08-24 23:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5f681d1bd0579c3dff6cc601c08cd49b SHA-1: efd6058cd40438ebcfb71bf4cea8ba4f26e36c39 SHA-256: 5e08b4915519f8038d93e40c407bc6d317a534ad0ad0e8f5ad2721c767309111
162 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure for software downloads, specifically mentioning 'chrome browser for windows 7'. The ML classifier strongly flagged this PDF as malicious. The presence of multiple external PDF links also indicates a link farm, likely for SEO manipulation to distribute the malicious content.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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.com/pify?keyword=chrome+browser++for+windows+7 In PDF document text
    • http://gowefib.thorsonpto.org/uploads/1/3/2/6/132696067/9dc36ecc91.pdfIn PDF document text
    • http://files.mrpowellscience.com/uploads/1/3/2/7/132740614/5739026.pdfIn PDF document text
    • http://files.rosekyungwonkim.com/uploads/1/3/1/4/131453555/0c4f872bcd.pdfIn PDF document text
    • http://guweguxo.milbur.org/uploads/1/3/1/4/131409508/wiwapuporisan.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/1/0431/8288/2980/files/blood_types_and_diet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1860/0095/files/deborah_harkness_all_souls_trilogy_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2236/0481/files/adrenalina_y_noradrenalina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4946/6526/files/characteristics_of_life_lab_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8265/9493/files/98738374764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9128/7461/files/android_command_line_tools.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/acta_constitutiva_de_una_asociacion_civil_en_mexico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mowojemabedeju.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_off0000692a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x692A 5124 bytes
SHA-256: fc647a1216f0dd71623337da28d5da266a1acacce1617c9a8090cdecb17aa78f
font_01_sfnt_off00007a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8C 12872 bytes
SHA-256: 4432d4bb12254853d0abddeddc841063712955239f7d626c381ea99fa3c01da1

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