Malicious PDF — malware analysis report

Static analysis result for SHA-256 52f1b6b82d0719df…

MALICIOUS

PDF

51.4 KB Created: 2020-08-14 02:21:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f76b307683a29dd026c3f32419626d23 SHA-1: 2c0241f5c19f242ef3b7f4ac5be5ad9dd69026be SHA-256: 52f1b6b82d0719dffd8d37e38caace0b104c680d1b06b397ff4bbdd940e4e7fe
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.ru. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of outbound links, many of which are likely intended to lead users to malicious content. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL that triggered the redirector heuristic.

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/wb?keyword=midpoint%20worksheet%20geometry In PDF document text
    • http://files.hazlehurstcentre.org/uploads/1/3/1/4/131437249/3037862.pdfIn PDF document text
    • http://files.scotdancenz.co.nz/uploads/1/3/0/7/130738769/8399703.pdfIn PDF document text
    • http://zijuk.tourscottys.com/uploads/1/3/1/4/131453630/6276233.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/1/0433/0124/0985/files/sobotta_atlas_d_anatomie_humaine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4545/3985/files/dedudorolojire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6896/2469/files/baxomezeditaporopobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/todusisavelex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1737/9745/files/8296577732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2199/9008/files/hdfc_bank_ltd_rtgs_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8073/6150/files/femepisuduz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5435/7915/files/portfolio_lighting_manuals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7353/5138/files/vebasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1089/1682/files/prc_answer_sheet_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8011/3562/files/practical_guide_to_extrusion_blow_molding.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/bijororoneb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3493/4429/files/66165293020.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81A4 2828 bytes
SHA-256: dd7b880f1c6958317b71933e3175eb4154b1281d355b69180e4ce829e506ee21
font_01_sfnt_off00008b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9E 5396 bytes
SHA-256: f04e27259213ecab16dc27e79f8dec52ca068529ccf4f5518d87f29041941bb1
font_02_sfnt_off00009de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DE9 10060 bytes
SHA-256: 692330118ebf97bc94bc9e17e8509ab3164b620d454de1882c1d55c604f63083

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