Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1d752c3dc58608b…

MALICIOUS

PDF

44.4 KB Created: 2020-08-07 02:24:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 49a8c0bda9f816abad79decf49f8f5ca SHA-1: b408c696145f24137e2f5b9a1077d3bd80b918a7 SHA-256: b1d752c3dc58608bcc0c2cd766063fd1fadd99e3b7cedb34c987ef82bb00d59f
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector heuristic. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the ultimate destination. The 'SE_REMOTE_SUPPORT_LURE' heuristic suggests the document may also instruct the user to install or connect to remote support tools, which is a high-risk activity in unsolicited documents.

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=learn+javascript+step+by+step+pdf In PDF document text
    • http://files.prizmdesigns.com/uploads/1/3/2/6/132680901/8791069.pdfIn PDF document text
    • http://files.tinablanck.com/uploads/1/3/1/4/131407423/90778.pdfIn PDF document text
    • http://files.actacoustics.co.uk/uploads/1/3/1/1/131163788/nitogozemux.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/1/0438/7074/8827/files/vesej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/39033394789.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8105/6935/files/41201616941.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8742/9781/files/socialismo_e_capitalismo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4007/9005/files/bijixemesutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7656/7711/files/77072111180.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0406/6967/files/nuvodujowitozudeputuwuti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2610/3971/files/lafowoviwuro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/firokepazasuguxomed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7577/1304/files/49342622864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0161/8330/files/84122839249.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2207/4534/files/dixomulalazaripa.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_off00006e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5C 5436 bytes
SHA-256: 28951e2b3aef0117f09fbeb1272eac2a123014471712f25430d8803a86815827
font_01_sfnt_off000080fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80FD 10548 bytes
SHA-256: 7ec36a988d6a8587a952223f530b0b224394b9eeea3f17f9c2e62ac161b83516

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