Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c26edbcbd683cf9…

MALICIOUS

PDF

41.0 KB Created: 2020-08-14 07:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8a61dac183c89835e6e2c508f47f9ff2 SHA-1: 157841102cfa8e6776d79a194535613aa3c78231 SHA-256: 4c26edbcbd683cf9bc9bd5a38c47dbc85aa9cd120781b52b6da0870c9d6ead71
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The primary malicious URL identified is 'https://ttraff.ru/wb?keyword=february%202019%20current%20affairs%20pdf%20adda247', which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other Shopify-hosted PDF links, suggesting a coordinated effort to distribute malicious content or traffic. No scripts were extracted from this sample.

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=february%202019%20current%20affairs%20pdf%20adda247 In PDF document text
    • http://files.hidayatashila.com/uploads/1/3/1/3/131379085/4780627.pdfIn PDF document text
    • http://files.mayusilkart.org/uploads/1/3/1/4/131411474/kotereruvoda-dumob-gepof.pdfIn PDF document text
    • http://files.hannahcurrantshiatsu.org/uploads/1/3/0/7/130775309/3714372.pdfIn PDF document text
    • http://nogabuk.jenniferframpton.com/uploads/1/3/1/3/131384401/1e8d2d2.pdfIn PDF document text
    • http://files.dank-erie.org/uploads/1/3/1/4/131406321/misujovubeparaxub.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/1/0437/2132/6742/files/travi_scott_rodeo_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1927/9258/files/1063758531.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20597849085.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/fitakidobizamiwirumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1255/2864/files/hampton_bay_landscape_lighting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5397/3657/files/offline_mode_steam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1471/6572/files/28508027451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/sawexegugubalotor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/kezukaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1461/7250/files/72926513959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0524/5597/files/81804871060.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6067 5964 bytes
SHA-256: 8a159b7d40704f072c28c289486367784b021e5635b66ce7c7f436838f25a5ce
font_01_sfnt_off000074d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74D9 10012 bytes
SHA-256: 794e0d4549335dd1b00e0cc087dd8720528b2f2d22403eeca2bf35c616016693

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