Malicious PDF — malware analysis report

Static analysis result for SHA-256 502ed1f60107a939…

MALICIOUS

PDF

39.3 KB Created: 2020-08-19 16:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c6d05b876d06840ef63bb84c39bb3d5f SHA-1: ae2ecc0398c6404c0e7f68d3ccaa3672a1d934d0 SHA-256: 502ed1f60107a939a049104691088c5525671eb36ccc9a404458b9c211399a2e
194 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. Additionally, it contains a large number of external PDF links, suggesting a link farm designed to distribute malicious content. The primary malicious URL identified is https://ttraff.ru/pify?keyword=2+and+4+stroke+engine+pdf, which is likely used to redirect users 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.ru/pify?keyword=2+and+4+stroke+engine+pdf In PDF document text
    • http://weriv.simplysouthernfoodie.com/uploads/1/3/0/7/130775505/labesirarewidanemi.pdfIn PDF document text
    • http://files.owius.org/uploads/1/3/0/8/130814120/f869c74a634.pdfIn PDF document text
    • http://files.collegeparkchorale.org/uploads/1/3/0/7/130775393/526489.pdfIn PDF document text
    • http://novulagi.meaningfulhealthhurunui.org/uploads/1/3/2/6/132681946/vizevabut.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/87967576867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1704/3101/files/71781727496.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0011/1009/files/rerodotove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/6625735131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0097/7816/files/fumumajexirekakurulude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1279/2221/files/atlas_anatomie_du_corps_humain.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0617/3081/files/wii_game_wads.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7461/7511/files/21029427118.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5491/3943/files/wuteweropora.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_off00005d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D94 5364 bytes
SHA-256: 1bafff40d9ce358b3db09f3eeeb830267456ad6bdbb45dbc5c4a33ecc898739e
font_01_sfnt_off00006fe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE7 9596 bytes
SHA-256: 668e54e96fae563894fd6c014c14ad3f812781c70ea90d9116454b09eed347ff

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