Malicious PDF — malware analysis report

Static analysis result for SHA-256 722c8f9f7982d32b…

MALICIOUS

PDF

49.3 KB Created: 2020-07-29 14:24:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cba037f07a8a391f58f45174fe9822af SHA-1: 42cecc9163f3fd6b068a6b8c001def770453f233 SHA-256: 722c8f9f7982d32b93ac77cc68baa01d121256ccbfded489598528e184bdee57
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, masquerading as a worksheet to entice clicks. Several heuristics indicate the presence of malicious redirector infrastructure, specifically pointing to 'ttraff.ru'. The ML classifier strongly suggests malicious intent, likely for phishing or malware delivery.

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=mitosis+and+meiosis+worksheet+pdf In PDF document text
    • http://files.michaelarubin.com/uploads/1/3/0/7/130738949/nebuk.pdfIn PDF document text
    • http://files.bluetorchfinance.com/uploads/1/3/0/7/130775220/15a42ae8.pdfIn PDF document text
    • http://files.honkrenaissance.net/uploads/1/3/1/0/131070520/3578f9490c503.pdfIn PDF document text
    • http://files.dronkadiscountstore.com/uploads/1/3/0/9/130969545/2646941.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/1/0433/0687/7080/files/lorirazapevimixawas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2177/0656/files/bufiresugilevoforuke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/zexafegefuvosajavexab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/46514708315.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/78614608691.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2623/4009/files/zexejagisutiluzel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/salovukigokepodaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/86390352276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6955/2293/files/juzepemasoxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1238/1079/files/kadirupewalesuxokogori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5929/0022/files/finufujerez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35117459625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0965/4432/files/6071451711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4925/5066/files/83074753022.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_off00008394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8394 5200 bytes
SHA-256: 6059febf76a260b786792a7719e0d5e656be1760fa27c24e38a086a379bc7921
font_01_sfnt_off00009520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9520 10208 bytes
SHA-256: a0a14b306b58876ffd129c9ee16ab2396c6d081e1367b8ab71bbc5afdc4028c2

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