Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffeaa6e6563be19c…

MALICIOUS

PDF

41.9 KB Created: 2020-08-11 16:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 613755b4d19fce04758055a95cbac305 SHA-1: 3cc262bbdde2ec72037fdb7661419ea9032e1e83 SHA-256: ffeaa6e6563be19cb04e6ad5c2d710a6f208438f75e0c1a00c5013b290dcb183
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious link, https://ttraff.ru/pify?keyword=definition+of+cloud+computing+pdf, is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically to appear as a legitimate document. The presence of numerous SEO-optimized PDF links indicates a link farm strategy to improve search engine ranking for malicious content.

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=definition+of+cloud+computing+pdf In PDF document text
    • http://files.apwindowsuk.co.uk/uploads/1/3/1/4/131453695/xusoso.pdfIn PDF document text
    • http://files.visiblechurchgb.com/uploads/1/3/0/7/130775434/rovevijegijavuw_remonun_nupozi_pixef.pdfIn PDF document text
    • http://files.drgigisrmuf.org/uploads/1/3/1/8/131858916/tetajop_boxiborefevoxo.pdfIn PDF document text
    • http://files.lrhelpinghand.com/uploads/1/3/1/3/131380440/xopexuzirofib.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/1/0436/5221/9030/files/beverage_production.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0144/6551/files/44559886240.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6046/0701/files/85148197518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2087/0044/files/61256836049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8207/2732/files/90103767219.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/welixefuxeju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3152/7575/files/bekosevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0239/5813/files/bubasopumadoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5802/6903/files/pujopoxibakatojidireje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2684/9700/files/ketovil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6058/4870/files/veigar_aram_build.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
🗂 Part of campaign: alcuincollege.com 8 samples

Related samples 7

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_off0000651c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x651C 4988 bytes
SHA-256: 4574862af8a1bf7442868bc811735defb16cebd9cd14efea0c665cb4ad94b341
font_01_sfnt_off0000760d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x760D 10728 bytes
SHA-256: 63a8be42e8b57ff8d313f8d5719952e363dd647f1c9b3e158066ea18141abc55

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