Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4b1702bd2c2f5ba…

MALICIOUS

PDF

43.8 KB Created: 2020-08-03 09:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5cf029442564eeb64f424faac69c7cf6 SHA-1: 2bde7a8d74268bb1b32f14d070e2f682f30b83c5 SHA-256: b4b1702bd2c2f5ba32f79b1fee67ffd377af6dddd55611c83a7106b4c7c2baa5
194 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, containing numerous embedded URLs pointing to external PDF documents. One of these URLs, 'https://ttraff.ru/pify?keyword=ftp+for+3ds', is flagged as a malicious redirector. The presence of a large number of links suggests an attempt to manipulate SEO or distribute malicious content indirectly. No scripts were extracted, and the document body is heavily obfuscated.

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/pify?keyword=ftp+for+3ds In PDF document text
    • http://files.nancytoofani.com/uploads/1/3/0/7/130775786/8399023.pdfIn PDF document text
    • http://files.wowgraphix.com/uploads/1/3/2/7/132710665/2543720.pdfIn PDF document text
    • http://files.celebrategreaterplymouth.org/uploads/1/3/0/8/130874295/7e6993c6c38330.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/73612768686.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/24731934719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9673/4880/files/renuborak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zawitowawipujeko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6109/2250/files/60958713768.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3080/5669/files/nitalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/jogezemobus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/72471292917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/xalopusog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6404/9318/files/dutimexadutexivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5734/7749/files/60528754706.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wesani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8480/7334/files/topokosurugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5039/2984/files/latigejikit.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 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6269 4428 bytes
SHA-256: 5240e0ad2d9b63fad79b075c714887261a5be0137a060c799404a6857b037404
font_01_sfnt_off0000717e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x717E 10248 bytes
SHA-256: 8cc14d8d0f5ebcb6c806da70883fe5378eb9f654205e9f4553308ca6a93413ff
font_02_sfnt_off000094a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94A4 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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