Malicious PDF — malware analysis report

Static analysis result for SHA-256 91942643578b6800…

MALICIOUS

PDF

36.0 KB Created: 2020-08-19 06:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 21de4fc3c3d8aa41110f8ab373262f3d SHA-1: 038a30a84842700855b4983c69dcc3c591af977b SHA-256: 91942643578b68009aaf7f5fda80a891b20d9fe2575514e5f10970b808b3a1cd
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, "https://ttraff.cc/pify?keyword=kahoot+bot+hack+apk", is designed to lure users into clicking it. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, likely for SEO manipulation or to host further malicious content. 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.cc/pify?keyword=kahoot+bot+hack+apk In PDF document text
    • http://files.friendsoftheriverbanks.org/uploads/1/3/2/6/132681767/7bee3.pdfIn PDF document text
    • http://files.elocaldelivery.com/uploads/1/3/2/7/132740541/jedop_raziv.pdfIn PDF document text
    • http://pizakupi.duogivesback.com/uploads/1/3/1/6/131606289/2ccbe88c47c846d.pdfIn PDF document text
    • http://mogivusor.nedrapezoldroberts.com/uploads/1/3/2/3/132302984/2352079.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/1/0430/9434/3841/files/pogamenomafujew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1979/5623/files/85248839227.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0691/0876/files/windows_7_generic_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6495/0946/files/wimaka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6214/0840/files/antes_de_ti_libro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1207/7206/files/cicd_full_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1629/7368/files/26661756122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0280/5921/files/komewowemek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5300/7526/files/52699041569.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/bikidebaba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6264/7192/files/nexolef.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 5

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_off00005171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5171 4888 bytes
SHA-256: 7038c90b480b69baffa6bdab108acc3172731db8f28ad9dd28b06c5d93199f40
font_01_sfnt_off0000620c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x620C 9780 bytes
SHA-256: ef20a0d459a94abdbb0c945c3adf70b68e1b455089936dbf66608bccd4c98d9f

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