Malicious PDF — malware analysis report

Static analysis result for SHA-256 9862a526959d4188…

MALICIOUS

PDF

45.2 KB Created: 2020-08-12 09:06:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 33015326f497307a227ec5ea225e0ae0 SHA-1: 72122d0bd5ab0a2eb15801f76276a01eee604e9f SHA-256: 9862a526959d4188994b54288f8fe638c1aad4e9a16fda61a6a81f3817ad731a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'pdf annotation app free' and a URL that aligns with the malicious redirector heuristic. The presence of a large number of external PDF links suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites.

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=pdf+annotation+app+free In PDF document text
    • http://kewiposoz.2cvtv.co.uk/uploads/1/3/2/6/132695742/mowibitadosid-bukadatikuve-fogid.pdfIn PDF document text
    • http://files.schecktech.com/uploads/1/3/1/3/131381910/wixakuzaguk.pdfIn PDF document text
    • http://files.algartforms.com/uploads/1/3/2/8/132814147/643358.pdfIn PDF document text
    • http://files.southseattleoto.com/uploads/1/3/2/6/132681556/1959933.pdfIn PDF document text
    • http://files.it.montebernardi.com/uploads/1/3/0/8/130814769/buvurozugi.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/1/0428/9835/8432/files/wugituvunajobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5552/1700/files/70594938096.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0673/0138/files/zokagumawekujenenujiloke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5506/2938/files/59442843586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/aloha_movie_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8137/5648/files/data_mining_concepts_and_techniques_4th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5452/1758/files/widuzeja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2979/8818/files/introducing_applied_linguistics_pit_corder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6711/1584/files/50417289035.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3088/8094/files/kozirixexosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7478/0312/files/22268472470.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 5

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_off000072dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72DC 4824 bytes
SHA-256: 1b350f5c9ee67b91fcb52669e583764a88f1bfc058a2233a568f707ca6d3c205
font_01_sfnt_off00008356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8356 10748 bytes
SHA-256: 899f2f762eec1ca8714821ff291bd40c8801bd37727e75c03218182847bdfc92

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