Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74f27e36436cee8…

MALICIOUS

PDF

35.8 KB Created: 2020-08-20 14:08:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b925c7deb39d10346be4b4cd1825e4b2 SHA-1: aa1e2790056e70a01f8fe1c030acf3fe81e433b8 SHA-256: e74f27e36436cee87be9f9a5c53fd695b543a2fa689a4a1369c66b8dbb631bb3
194 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URL 'https://ttraff.cc/pify?keyword=blank+formal+letter+template+ks2' is identified as a malicious redirector. The document body, though partially corrupted, contains text related to formal letter templates, suggesting a lure to disguise the malicious intent. The presence of numerous external links points towards an attempt to drive traffic to potentially harmful 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.cc/pify?keyword=blank+formal+letter+template+ks2 In PDF document text
    • http://files.grcrowfamily.com/uploads/1/3/1/0/131070190/3426f7e.pdfIn PDF document text
    • http://files.douglaslynnwhite.com/uploads/1/3/1/6/131606492/2c0cddd2.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/1/0428/6434/5255/files/17525431109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2409/7191/files/17082356596.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2631/7473/files/nugawujomipena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8368/5270/files/99990258547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/77206299375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1088/9624/files/jugaloreni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0749/8647/files/nitric_acid_msds_sigma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9740/0223/files/62563771314.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1610/8701/files/canciones_acordes_guitarra.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_off00004e62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E62 5292 bytes
SHA-256: ccf6a2f7397f9893f32ff6a3bc626c982c964a241583810c7f11e70b3d7a3752
font_01_sfnt_off00006050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6050 10080 bytes
SHA-256: fac66c2f9b49d3da5ea59c73901beecd11eeab17849ca8f9da965137bb33073c

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