Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2497efeb52dd08…

MALICIOUS

PDF

49.3 KB Created: 2020-08-17 04:21:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4fb1ffa468986cbd0f30b1b46fe9f92e SHA-1: 6f0dc213b0ff4f570e795ed2b0637fda6e091a50 SHA-256: 5e2497efeb52dd0889f4b77da6514e921aa4f79353a569ce60536e000c52c927
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=learn+portuguese+portugal+pdf'. The document body also contains this URL, suggesting it is the primary lure. The presence of a link farm heuristic indicates a large number of external links, many pointing to Shopify domains, likely to obscure the malicious redirector. The ML classifier strongly flagged this PDF as malicious.

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=learn+portuguese+portugal+pdf In PDF document text
    • http://files.peculiaritypress.com/uploads/1/3/0/8/130813770/f174b0d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7987/6252/files/andrei_moreira_livros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2768/4760/files/58806993169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1699/3440/files/49504190178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/4377/8723/files/pufugojupopuwojajerupam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1607/7991/files/65776994703.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9946/4611/files/8509450699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1695/3751/files/taiwan_travel_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9208/9759/files/96866014076.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25322908130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5996/0218/files/tutelufibepofepemixedis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2711/9784/files/65730759177.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7612 4984 bytes
SHA-256: 4c909e2dbe1e12a6085df46655bd66c18c0768643b15ac8555ee065916561014
font_01_sfnt_off00008714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8714 10420 bytes
SHA-256: b3941dd57e444226f5646753b9c642f2213fa05fd317571acbba12ddc22e6421
font_02_sfnt_off0000aab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAB5 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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