Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a464f005c2501ca…

MALICIOUS

PDF

53.5 KB Created: 2020-08-24 17:11:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8bcf090b5fee4945e456acd3efe0f63d SHA-1: fc1cab2e83c720c2a53d532d26ebe3e82ce335ce SHA-256: 4a464f005c2501cafc28da1056df36621d5569400b063cbc7d111f57b0808257
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=st+augustine+confessions+pdf'. The document body, though heavily obfuscated, contains references to 'st augustine confessions pdf' and the authoring application 'wkhtmltopdf', suggesting a lure for users searching for this content. The presence of a link farm heuristic further supports the SEO-based lure attack pattern.

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=st+augustine+confessions+pdf In PDF document text
    • http://nepuma.densityanalytics.com/uploads/1/3/2/3/132302978/3123030.pdfIn PDF document text
    • http://files.nicolettelynch.com/uploads/1/3/0/7/130775137/3210622.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3880/1061/files/jotaguzopovegiteriloputis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3942/4663/files/77459920402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/befuxasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2646/5436/files/91822712004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9658/8967/files/38165988012.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/chikati_gadilo_chithakotudu_telugu_movie_hd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3791/7335/files/sutemufelumuxetisajir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0455/4794/6149/files/86861072209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1402/8444/files/81786188692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7265/0397/files/kenazuwikodolorarurag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30617095305.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 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8706 5180 bytes
SHA-256: 59057cb3a4db197a7526fb41ab976b46fac8b1589c2ff5332c634b3061f42b79
font_01_sfnt_off000098af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98AF 10000 bytes
SHA-256: 52c90ff293d0626f667b452e3ffff05882e707f9d391d6520d1918e4503239f1
font_02_sfnt_off0000bae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE8 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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