Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f3895f705ffe4d3…

MALICIOUS

PDF

45.0 KB Created: 2020-08-19 22:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8dd641a5207ea5b5a74f84a512a6afe6 SHA-1: c715031dc8d5dc341dc1d0ecb4d96ac74cfb9f48 SHA-256: 5f3895f705ffe4d3f870277bfc98584c92204869a22f2571f71f5e50eea29597
194 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The primary redirector URL is 'https://ttraff.com/pify?keyword=two+digit+subtraction+with+regrouping+worksheets+pdf', which is presented as a link to 'two digit subtraction with regrouping worksheets pdf'. This suggests a phishing or scam attempt using a lure of educational content to drive traffic to a malicious site. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.com/pify?keyword=two+digit+subtraction+with+regrouping+worksheets+pdf In PDF document text
    • http://files.privatetourssanfrancisco.com/uploads/1/3/1/3/131384429/nomamodezenawi-wujidibimik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7211/9193/files/durifutefegukavumila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/44145907078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7686/1606/files/nugukusufunisizik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/xutiparomuviwuwem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0522/2822/files/95828787902.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5996/0218/files/paralegal_billable_hours_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2555/3815/files/27075658900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9377/7827/files/71020390162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5891/3689/files/71775831411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8024/3617/files/calculus_and_its_applications_13th_edition_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5283/4717/files/67387958459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7777/1164/files/47282435829.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 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A0 5512 bytes
SHA-256: f5f1b3d7090d302668376419a1d38cfc58b7e08ece2d002642258c9831dedda8
font_01_sfnt_off00007567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7567 10212 bytes
SHA-256: 6c35dc257c96b7a7f564dbd6ca4a346b086922f4691daf8fd056b4f5ef6cc4bd
font_02_sfnt_off0000984e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x984E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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