Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e64bb16f297d0e3…

MALICIOUS

PDF

40.2 KB Created: 2020-08-18 23:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 99e2ae891f9ce10323022f30402cabaa SHA-1: 4947265429629232902971ea6cd8f412a6b95e70 SHA-256: 2e64bb16f297d0e3c7419d529060cf9b68970b304cba110b2f4a697dd35868ee
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 domains known for hosting malicious content or acting as redirectors. The primary redirector URL, https://ttraff.ru/pify?keyword=introduction+to+statistical+learning+with+r+pdf, is specifically flagged as malicious. This indicates the document's purpose is to lure users into clicking these links, likely leading to further malware downloads or phishing attempts. The ML classifier strongly supports the malicious nature of this PDF.

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=introduction+to+statistical+learning+with+r+pdf In PDF document text
    • http://files.editingiseverything.com/uploads/1/3/1/4/131410662/9c9bd377d0.pdfIn PDF document text
    • http://files.three54.co.uk/uploads/1/3/0/7/130775639/3932064.pdfIn PDF document text
    • http://zomukej.ursulinemetz.com/uploads/1/3/1/1/131163507/9698418.pdfIn PDF document text
    • http://kedumiz.considerhimoutreach.com/uploads/1/3/1/4/131408899/luzaniwabetixufut.pdfIn PDF document text
    • http://files.jaymelemke.com/uploads/1/3/0/8/130873820/7e360a9118.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/1/0438/9027/8568/files/fasusuxenufepatubejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2751/0934/files/23361523299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2779/8943/files/jquery_get_selected_option.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/30166604166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2710/2887/files/british_council_english_grammar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7193/8461/files/zojesaguza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4578/8584/files/najigizesagosin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57515970725.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4950/8246/files/lusepunijamivuviveta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1136/5272/files/gipegiberanebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/18120823728.pdfIn PDF document text
    • http://www.amazon.com/dp/1461471370In PDF document text
    • http://www.springer.com/statistics/statisticalIn 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_off00005dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC1 5444 bytes
SHA-256: c6a6457fe0d254db1658733e7a035071f7981117fd1f0fda99f9d6cb14508ad9
font_01_sfnt_off0000704f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x704F 10344 bytes
SHA-256: 896771f441988071fbf5626ac74ef6f6411c8c401c55097949739d38d97c9dd8

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