Malicious PDF — malware analysis report

Static analysis result for SHA-256 13b5f1194bc93889…

MALICIOUS

PDF

39.3 KB Created: 2020-08-24 16:23:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 13047d8aebcc23f2973b1f339e371dc9 SHA-1: 1ad1e0a1b2375e95be6f53a9b15b8b3c8a35d2f4 SHA-256: 13b5f1194bc9388992f24e223ca0990b0b211a839a51808dec8ea09ca84ce473
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a redirector to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL pointing to a redirector. This suggests the primary purpose is to redirect users to a malicious site, likely for phishing or malware distribution.

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=brown+bear+brown+bear+in+spanish+pdf In PDF document text
    • http://files.edgewater-tenant.com/uploads/1/3/1/3/131398195/bigivaf_dozagogivo_xufegurujulatil_pinigedolaj.pdfIn PDF document text
    • http://files.caringheartsunited.com/uploads/1/3/0/7/130776726/fabat-jebuporitad-mukuledidiv.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/1/0435/2222/8379/files/jovuwamom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9970/8821/files/visual_studio_2017_android_emulator_is_slow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/folijipegemilizozomu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/13848487087.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9200/9379/files/rasafazaduxonine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0668/0484/files/kulibameji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0379/7913/files/aidin_salih_yitik_ifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4501/1112/files/vazamidarebepadoxodara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8702/8641/files/wedding_magazine_cover_template_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4953/4111/files/55142770651.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/dorapijixanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2513/6792/files/java_api_documentation.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 1

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_off00005ade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ADE 5376 bytes
SHA-256: a1e64a4878593ebf7ca8f86499a8ebebba12f33f66f88f1ae170cb441c478f09
font_01_sfnt_off00006d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D2C 10332 bytes
SHA-256: 20109a82f9e510723fbf2a98bdf1789b47179925dd01c6f2bd3ca89d668cc962

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