Malicious PDF — malware analysis report

Static analysis result for SHA-256 72a0ac1a7ad36afb…

MALICIOUS

PDF

45.9 KB Created: 2020-07-20 03:02:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: b01a5fafc8e3d35f0bc243fffeae0910 SHA-1: 2dd7df35b179f835cb120aa72978be78ca3bf7be SHA-256: 72a0ac1a7ad36afb65482f591d1d515afc5d03c7d93290f8b81863730274342c
194 Risk Score

Malware Insights

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

This PDF document acts as a lure, employing SEO tactics to distribute links to numerous other PDF files, likely containing malicious content. The primary redirector URL, 'https://ttraff.com/wb?keyword=cisco%20academy%20network%20fundamentals%20pdf', suggests a phishing attempt disguised as educational material. The ML classifier strongly indicates maliciousness, and the presence of many external links points to a link farm strategy.

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/wb?keyword=cisco%20academy%20network%20fundamentals%20pdf In PDF document text
    • http://files.cterveer.com/uploads/1/3/1/1/131164399/3167768.pdfIn PDF document text
    • http://files.miguelamado.com/uploads/1/3/1/1/131164399/titiro.pdfIn PDF document text
    • http://files.dbsa-glbt-chicago.org/uploads/1/3/2/6/132682171/davidajuvibarasu.pdfIn PDF document text
    • http://files.vardismarinakis.com/uploads/1/3/0/7/130776150/136287.pdfIn PDF document text
    • http://files.tienshintemple.com/uploads/1/3/1/1/131164476/948084.pdfIn PDF document text
    • http://files.ketonetpasim.com/uploads/1/3/1/3/131382346/nenidebejifaso.pdfIn PDF document text
    • http://files.bonplan-pinel.com/uploads/1/3/1/4/131437423/zavurubegix-kevekepuxasanaw.pdfIn PDF document text
    • http://files.cppbap.org/uploads/1/3/0/7/130739260/0d93a91.pdfIn PDF document text
    • http://files.jenwahintuition.com/uploads/1/3/1/3/131381006/41a12ca2bfad29.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://figosita.files.wordpress.com/2020/07/tiguxivuvejusenumema.pdfIn PDF document text
    • https://mebenevox.files.wordpress.com/2020/07/86650205200.pdfIn PDF document text
    • https://luvipif.files.wordpress.com/2020/06/dejuwevipanoravuwibafuwib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pewobaropelizovijekozuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8904/9238/files/79537313353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/68557070634.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1915/8183/files/livadasasepumalakebexipob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/ridewigokuruvipasawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7661/6341/files/ponakipozem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8167/9523/files/pugemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xixuvedivikeror.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_off000072e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72E8 5464 bytes
SHA-256: 648410347fc5f63c609edf79ed2d26f4a4baa65b37ec1b5992834cdd653f24c6
font_01_sfnt_off0000857e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x857E 10268 bytes
SHA-256: b9a9b55b7248e5ba3858bf152b21640d7ea72243b3256a4b315a92e63395b793

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