Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e345ff6553a884…

MALICIOUS

PDF

38.9 KB Created: 2020-08-16 22:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 424a31c40d69f06b7b1dc9f700c0f7ef SHA-1: f3e57e162fb915e58e92f269226910919964c448 SHA-256: c6e345ff6553a884288031659a652e2a6eb6d6a3e6885b360da746961af72db2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with the primary redirector URL being https://ttraff.com/pify?keyword=adding+and+subtracting+integers+worksheets+kuta. This URL is classified as malicious and likely serves to redirect users to further malicious content. The document body, though heavily obfuscated, contains text related to 'adding and subtracting integers worksheets', suggesting a lure to trick users into clicking the malicious links.

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=adding+and+subtracting+integers+worksheets+kuta In PDF document text
    • http://files.charlthom.com/uploads/1/3/0/9/130969065/vewaputaxeruver.pdfIn PDF document text
    • http://files.oakgrovechristianschool.com/uploads/1/3/2/6/132681322/wonenuketodoriw.pdfIn PDF document text
    • http://files.larrondolab.com/uploads/1/3/1/4/131406153/ritowerogenilebejil.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/1/0432/5159/7480/files/tozosap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/54440827626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/3973891155.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5560/4134/files/58840412636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1348/9318/files/stm32_arduino_ide_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7041/3207/files/pedal_edema_in_pregnancy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9806/2501/files/ruxitopagoxesolojetozubiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/kivuze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0252/7897/files/xuwit.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_off00005870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5870 5456 bytes
SHA-256: d9b33d82fb8ce8a69024a962d76e689c479810428cc31d42ec29b5c05a6aea50
font_01_sfnt_off00006afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AFC 10372 bytes
SHA-256: 34086ab4063b194b89c8d134b8df2544255326feea0138d2ba085d63df602f66

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