Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d07f6b8676f4a2f…

MALICIOUS

PDF

41.1 KB Created: 2020-08-15 00:39:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d38dfde06ec2a4d4ca14b33dcb61bbc3 SHA-1: 899ac6f32827b0b64bc2d7927aff7805c08c1615 SHA-256: 5d07f6b8676f4a2f8af942931bc02d236c1e76a80055d618171dc874e500bd24
202 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, masquerading as educational material. The ML classifier strongly indicates maliciousness, and the presence of multiple links to potentially malicious PDF files suggests a link farm or downloader tactic. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=maths+worksheets+year+7+printable In PDF document text
    • http://fukenodu.csulbmie.com/uploads/1/3/1/6/131637814/3b887.pdfIn PDF document text
    • http://files.thorpe-players.co.uk/uploads/1/3/0/7/130775354/zuxusadevo-nekaruwejiwepeg.pdfIn PDF document text
    • http://files.eliteracingadvice.com/uploads/1/3/1/3/131383777/8906835.pdfIn PDF document text
    • http://vefetoko.johnsonfamilypastures.com/uploads/1/3/0/7/130775934/6062020.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/1/0432/1335/7214/files/96850792561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2381/8139/files/ponuzabizulazofolopejaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3767/1080/files/flight_of_the_bumblebee_alto_sax_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6125/6096/files/lanimalugagaratikagegak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2806/2109/files/pigebufujumaduminuvubul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/sezupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5787/2033/files/alfabeto_en_ingles_para_nios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4530/6011/files/86607470434.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 1

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_off00005d44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D44 5388 bytes
SHA-256: b0cec35da4a4204baa5d8b3f3d63bafc68350268f0a37db29ae2230626c3c355
font_01_sfnt_off00006fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB2 12024 bytes
SHA-256: 59045582c582f7ab54a9d52edc73b5d6afb8301bd09a36682df48e94f42adc1c

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