Malicious PDF — malware analysis report

Static analysis result for SHA-256 05b812625b1b55b2…

MALICIOUS

PDF

45.3 KB Created: 2020-08-23 09:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1fb6b0e6209c1f6a5e74166ea83dcaeb SHA-1: b5ebe0f08231effc71f315909331aaabcb8921b6 SHA-256: 05b812625b1b55b2b85e53229b3a7e5389834022715696eaf6d4975b724fc685
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains URLs that appear to be part of an SEO link farm designed to lure users with seemingly legitimate content. The ML classifier strongly indicates malicious intent.

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=libros+de+auditoria+administrativa+2+pdf In PDF document text
    • http://files.unorthodoxphilanthropy.org/uploads/1/3/1/8/131872087/ziregoruxar-kapipepenefekuv-gidawetololenal-mumivam.pdfIn PDF document text
    • http://files.4lifeinc.org/uploads/1/3/0/8/130813821/mevebi_vumiji_maripopas.pdfIn PDF document text
    • http://files.handyvillage.com/uploads/1/3/1/4/131409709/3432559.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/1/0429/2447/4531/files/mizawoje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5383/2609/files/keynote_templates_free_technology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0744/2072/files/steve_soto_deadly_class.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1325/0965/files/doxikoranen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7828/7513/files/z_endorsement_test_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/nour_al_bayan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2022/2627/files/76047406330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9746/3715/files/62555359187.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2309/0343/files/balaa_drama_ost_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1394/7041/files/house_rental_agreement_format_in_tamil_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5367/0822/files/ratut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/48080876661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5981/2254/files/campana_de_gauss.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_off0000716f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x716F 5428 bytes
SHA-256: cb8428b73bf47305c4c9da770af7d1c47d3f8c38b92b63dd359f79134f018043
font_01_sfnt_off000083cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83CF 11200 bytes
SHA-256: e71b20bfebe0b2eb37ff9dba4dd7437280344529b535d174033842649e8a6dec

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