Malicious PDF — malware analysis report

Static analysis result for SHA-256 15eea2ad83a3c4ef…

MALICIOUS

PDF

47.8 KB Created: 2020-08-15 13:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9c1c5f49f0382d8ef9f8cbfe80574f27 SHA-1: b7ebaf303c0a263a454e78413acbc8c291b1adb1 SHA-256: 15eea2ad83a3c4ef10b58c53033500f504f8e235735f2b06634eafac014ca067
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, identified as a redirector for SEO-based lures. The document body, though partially corrupted, suggests a lure related to 'cursive penmanship worksheets'. The ML classifier strongly indicates maliciousness, and the presence of multiple external links points towards a link farm or phishing attempt.

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/wb?keyword=cursive%20penmanship%20worksheets In PDF document text
    • http://files.austlinq.com/uploads/1/3/0/7/130739779/eb2e7bfbfca.pdfIn PDF document text
    • http://files.crutchfieldshawaiiankenpo.com/uploads/1/3/1/3/131383953/0646119036c.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/1/0428/1712/6567/files/3118014954.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2935/4917/files/11545805820.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7577/8198/files/peanuts_theme_song_piano_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3123/1655/files/72672998111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/application_letter_for_lecturer_position.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1912/4382/files/taromesikajekugad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3444/1890/files/doderis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4309/4677/files/29126507648.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2770/1655/files/sagalov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0733/6857/files/58748156059.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8166/1600/files/56410767947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4715/7911/files/data_analysis_ebook.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF3 5148 bytes
SHA-256: 6df50a4d951b08066b794e42132c3e01ee85311fa6a4f39084ccc52301f0ba51
font_01_sfnt_off0000815e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x815E 10156 bytes
SHA-256: 6e8e083757c01ff3b7740ad26acb61f010a42494cdbc95120f594640191dd531
font_02_sfnt_off0000a422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA422 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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