Malicious PDF — malware analysis report

Static analysis result for SHA-256 63cd17719babf5a8…

MALICIOUS

PDF

56.1 KB Created: 2020-08-23 16:31:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4ed5dd49b715db716c79bfb80b6833c5 SHA-1: dbf21668edd231fa53d948e3ee9e68cb3b048c9d SHA-256: 63cd17719babf5a81d2eb13fe3805696b61a62f60647ce0a0f939e44d6813bc2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to an SEO redirector, which in turn points to various PDF files hosted on Shopify. The primary redirector URL is identified as malicious. The document body, though heavily obfuscated, contains the malicious redirector URL, suggesting an attempt to lure users into clicking it. The ML classifier strongly indicates maliciousness.

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=being+nocturnal+read+theory+answers+grade+8 In PDF document text
    • http://files.education4fun.net/uploads/1/3/0/7/130775520/a041e59.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/1/0427/8904/4383/files/7104878139.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5149/9170/files/cours_grammaire_espagnol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7235/4459/files/wafafolod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2309/0343/files/building_drawing_n2_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8341/3144/files/coriolis_mass_flow_meter_emerson_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0222/3013/files/nowol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6547/5229/files/92275851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/10710057443.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/jisuzomix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1998/5319/files/18729371236.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 2

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_off00008d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8C 5520 bytes
SHA-256: d675972dc7f2066531b11e5d6f0fbfae6cfe2af0ca097680292c59976cb032a0
font_01_sfnt_off0000a054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA054 10808 bytes
SHA-256: 9852a59b8215b9e3582620f72518e30fb2d6a42083bbe8548dbf0743f8d1b5f3
font_02_sfnt_off0000c50d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC50D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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