Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aa47af490c112a8…

MALICIOUS

PDF

40.0 KB Created: 2020-08-25 08:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9f934526023e47bb87c7f712ff4a38d6 SHA-1: 6e1ca985fe0f20f03cb92a2ba55f2bf36d7151bf SHA-256: 0aa47af490c112a852b404a8783fe0df047139f735509d11804793e143bf23b9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirection and link farming. It embeds a URL pointing to a known malicious redirector, ttraff.cc, which is disguised as a 'vindictus armorsmithing leveling guide'. This suggests a phishing or malware distribution attempt, leveraging SEO tactics to appear legitimate. The ML classifier strongly supports the malicious verdict.

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=vindictus+armorsmithing+leveling+guide In PDF document text
    • http://vedajo.oaklawnbaptistchurch.org/uploads/1/3/1/4/131409200/5343237.pdfIn PDF document text
    • http://veroxa.ernst-arch.com/uploads/1/3/0/7/130776132/b881083659.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/1/0429/8450/5498/files/mixitopusisix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7199/6053/files/areas_de_asociacion_cerebral.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/1882/9206/files/insomnia_treatment_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4695/9261/files/niko_bellic_soundboard.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/4318/4794/files/node_js_format_json_string.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2156/5078/files/2002_honda_civic_ex_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5387/5357/files/house_rental_agreement_templates.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_off00005f1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1D 5380 bytes
SHA-256: 304460ff978670f7b900e538c3837bdf5fbe34274316c6222bc7d798e0b5a22d
font_01_sfnt_off0000713c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x713C 10084 bytes
SHA-256: f777ec859335bbf39990912ca3f9f1bd4d43cd598b5dfbd1a32817d3c34fc669

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