Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f9a2272eb9d2f7c…

MALICIOUS

PDF

50.7 KB Created: 2020-07-25 08:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5ffcf7fe9f39295b47136b34de141ab6 SHA-1: 6beb5266da2507ec893dbe4bfcd09bca84d733b3 SHA-256: 4f9a2272eb9d2f7c71eccd66e30a39d1318145f47f1512af10899958f7653fc0
234 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1059 Command and Scripting Interpreter

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=counting+coins+practice+worksheets'. Additionally, it exhibits a high-severity heuristic for a clipboard command execution lure, instructing the user to paste content into a shell. The document also hosts a large number of external PDF links, many hosted on Shopify, suggesting a link farm or distribution mechanism. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=counting+coins+practice+worksheets In PDF document text
    • http://files.yukonhomes4rent.com/uploads/1/3/1/3/131384636/fixafuvaz.pdfIn PDF document text
    • http://files.estherhousecares.org/uploads/1/3/1/4/131438308/1f3a60eaf0d9cb7.pdfIn PDF document text
    • http://files.saraislas.com/uploads/1/3/0/7/130776724/nimizafogiwopikise.pdfIn PDF document text
    • http://files.rununashamed.com/uploads/1/3/1/8/131871744/55aa1e2d6a.pdfIn PDF document text
    • http://files.yellowstonewritingproject.com/uploads/1/3/0/7/130739265/derisizetepib.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/1/0430/3768/7962/files/76838968396.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6645/8265/files/dapuxatixibozovugibu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/puxatofutedixa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/pilawelaruli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9328/7331/files/34048864207.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8491/3563/files/71894257132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5199/8623/files/bijawatowerekus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2391/7478/files/94710304503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4007/2092/files/tevawumut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1175/1579/files/sorifafopetetozuzad.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_off00008120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8120 5224 bytes
SHA-256: 4f8fc6ac89f261fa09e8ab47c938e446ca7468b88dedea75f364d3871df52930
font_01_sfnt_off00009300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9300 13672 bytes
SHA-256: 60eace35a94ba77a103a2c1542a0731f595c9fb2ce98cae4c4eed1f746711717

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