Malicious PDF — malware analysis report

Static analysis result for SHA-256 90f27bdc169c1f6c…

MALICIOUS

PDF

44.8 KB Created: 2020-08-05 07:25:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ceff466dfd310a7b31e3d8ec6d332b16 SHA-1: c98a7efe0cf8b4ffc6a37fa95a45331d04554f54 SHA-256: 90f27bdc169c1f6cca65a08f9ae20ea3269cfdeaba621ec604e841ed91c70d5b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body, though partially corrupted, suggests a lure related to 'assessment guidelines', likely a phishing pretext. The ML classifier strongly indicates maliciousness, and the presence of a redirector link confirms the intent to lead the user to a harmful destination.

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.com/pify?keyword=vetassess+assessment+guidelines+pdf In PDF document text
    • http://files.actionins.net/uploads/1/3/1/3/131379680/fd82ace24a8f700.pdfIn PDF document text
    • http://files.countrylovelabradoodles.com/uploads/1/3/1/6/131607565/kapajiful.pdfIn PDF document text
    • http://resav.birthvoice.com/uploads/1/3/0/8/130874197/4a837f90fc2147.pdfIn PDF document text
    • http://files.rmbscenic.com/uploads/1/3/1/4/131483685/misaw-xesaxinekuxa-nikonozelemip-mipakat.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/1/0433/9433/4869/files/gojinuweza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3554/1151/files/best_thesaurus_dictionary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dusegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2385/8850/files/48320573104.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/sumiwipawigamalatonima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4207/7852/files/subnautica_table_coral_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/jixoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6823/3630/files/90370627551.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6459/7397/files/31768658097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/tikefatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1007/0440/files/pelvic_bone_anatomy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7649/9096/files/is_it_illegal_to_use_frostwire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4542/9160/files/wefozewikosiwevi.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 6

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_off000066d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D2 5232 bytes
SHA-256: da9d261782ac45e2e6b4f1ec0aa772a5cfd027bd6050952e7ae0a996bc54f32f
font_01_sfnt_off0000789b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x789B 14028 bytes
SHA-256: 526998c5238d3d079b0d536c7fc09c8d06f64c32afa8bdbda01bb829735ccb5a

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