Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f426c6d212bd8d…

MALICIOUS

PDF

38.4 KB Created: 2020-08-25 02:59:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c09adccd8560b45e69120df9c5aafd65 SHA-1: f61a196acf276e08b7d4758b4a6806e47c9a3511 SHA-256: 70f426c6d212bd8d4eff7b03b0ab20c6e09ef72b4fc1d0cadaad2c9ded9c151f
194 Risk Score

Malware Insights

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

This PDF document contains numerous links designed to create a link farm, with a primary redirector pointing to a malicious URL. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to lure users into clicking it for a purported research paper download. The ML classifier strongly indicates maliciousness, and the presence of redirector links points to a phishing or malware distribution scheme.

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/pify?keyword=non+probability+sampling+in+research+pdf In PDF document text
    • http://files.blackriverquarries.com/uploads/1/3/1/4/131437017/vireleve.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/1/0432/1892/7779/files/27398245201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/62831129417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4922/0256/files/juzazoniduwuliwobifape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4141/5587/files/zowebedamutalofunujez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4892/2270/files/43683766793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2458/7679/files/78894818528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/sample_of_accomplishment_report_format_for_teachers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6985/7176/files/biology_syllabus_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/banagapamadevurim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5109/6984/files/17681189644.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6527/8625/files/xatokivupagerufirufifuv.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
🗂 Part of campaign: americanautoaircarsales.com 4 samples

Related samples 5

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Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A4A 5780 bytes
SHA-256: 99d77948671505a664e7091fbed51007e00e582a6ed541a6682eb78bab2a7ff3
font_01_sfnt_off00006dc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC6 9204 bytes
SHA-256: 40752f27a635d9c55933e6a43a1f732ef62c21b1e73fb896eefc75d8b9355876

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