Malicious PDF — malware analysis report

Static analysis result for SHA-256 9efbd3d824d2ec81…

MALICIOUS

PDF

34.7 KB Created: 2020-08-13 01:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 87b1d96e50f3da59d129f0b4840ce9d5 SHA-1: 54bdc9edae61c5609bb285aabbb7114ba1c10aab SHA-256: 9efbd3d824d2ec81429556dfa025870f08f32f5e7e0fd061ffef41585ef2241d
194 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to benign Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to the malicious redirector, suggesting a phishing or social engineering lure. The primary attack pattern involves redirecting the user to malicious infrastructure via a link farm.

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=intermediate%20english%20assessment%20test%20pdf In PDF document text
    • http://files.leannewaterhouse.com/uploads/1/3/0/7/130776861/1549719.pdfIn PDF document text
    • http://jemoduju.aftercrafter.com/uploads/1/3/1/0/131070306/tosupa.pdfIn PDF document text
    • http://gosopasa.christcenteredironworks.com/uploads/1/3/0/7/130775373/310474.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/1/0434/2359/6693/files/mariage_d_amour_piano_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/amazing_grace_hymn_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9315/5230/files/bimutoxixipake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/3493/1363/files/63334913239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3502/3770/files/91192249061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/zapuvasine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13879903487.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6560/6301/files/bugoforeni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8384/8093/files/neverwinter_nights_weapons.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2073/0020/files/23450568989.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1000/6940/files/23103831361.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 4

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_off00004ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AD3 5392 bytes
SHA-256: 5f33ee1df248a3d2f0666d4b7f40b8704e66c4fdce0c8a1360e84b82f19d86f0
font_01_sfnt_off00005cf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF2 9708 bytes
SHA-256: 7ab15692d5e2c12c2bd3ce8a716a2a645d23853b7b6e0cc98bb646b04436f1f7

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