Malicious PDF — malware analysis report

Static analysis result for SHA-256 495e2f8d7323bfa9…

MALICIOUS

PDF

33.6 KB Created: 2020-08-15 11:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 918fb9b0ed7799946095d4a6b797fa4a SHA-1: c11b53dfd96bdb2cb470867a99707b80663a80de SHA-256: 495e2f8d7323bfa9aaffe44ae79cd9cde1d554e89abb73b5b3112ab80b2e6a1d
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO spam or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/wb?keyword=cashflow%20101%20board%20game%20pdf'. The document body, though heavily obfuscated, also contains this URL and other links pointing to Shopify domains, suggesting an attempt to disguise malicious content within seemingly legitimate file-sharing platforms. The presence of multiple PDF links further supports the 'PDF SEO Link Farm' heuristic.

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.ru/wb?keyword=cashflow%20101%20board%20game%20pdf In PDF document text
    • http://files.isis41don.com/uploads/1/3/0/7/130775292/luduviduk.pdfIn PDF document text
    • http://ninuleva.1800cuttree.net/uploads/1/3/1/3/131398125/kaxubo_zijifef_wabejirilipaxus.pdfIn PDF document text
    • http://files.irishmilersclub.org/uploads/1/3/1/3/131380001/nenudebok_mupowig.pdfIn PDF document text
    • http://dugaza.integraled.org/uploads/1/3/1/3/131381679/ruziwaban.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/1/0431/1734/6976/files/pdf_to_word_converter_free_download_nitro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6196/0091/files/vidux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8538/9221/files/noguxazesibozitida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1357/0709/files/25779725219.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5113/0785/files/3591680854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3376/3746/files/2969214486.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9244/2264/files/fowara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kofuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7831/0295/files/lojozeso.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 5

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_off00004345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4345 5784 bytes
SHA-256: d71931b3abbf2ff6a902e5077cc7e66854c1f3d48d23c600f860a69035997c0a
font_01_sfnt_off000056e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56E0 10304 bytes
SHA-256: 00c6e78168ce7d63a040ab86041db7bea5e37aeb153dd83758ae1fa7ef0f1985

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