Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6c711d5851cabdf…

MALICIOUS

PDF

45.4 KB Created: 2020-07-31 06:17:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ce4af33b3eb67f8a2d46dcc4b8408cd3 SHA-1: 3b2c5c09bbf70ac62bdc6045b502dcde5642d858 SHA-256: b6c711d5851cabdf2a2748b2e0227e34dd1b2dd4315123fa17342fb74f29d3e2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links designed to appear as a resource for construction processes, but they lead to a redirector service. This service likely serves as a gateway to malicious content or further exploitation. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests SEO poisoning for phishing or malware distribution.

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=cement+concrete+road+construction+process+pdf In PDF document text
    • http://files.connectedpropertyinvestment.co.uk/uploads/1/3/0/7/130775102/sejabifewenotovin.pdfIn PDF document text
    • http://files.innerpeacepastor.com/uploads/1/3/2/6/132696111/1229389.pdfIn PDF document text
    • http://files.studiobeeproductions.com/uploads/1/3/0/7/130738619/a63d9e2b4b134ac.pdfIn PDF document text
    • http://files.mootingsyndicate.org/uploads/1/3/1/4/131483253/lewotidedimitufemini.pdfIn PDF document text
    • http://files.dicksmarketgardens.com/uploads/1/3/1/8/131856770/8683407.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/1/0432/2364/6365/files/16090028519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0230/6468/files/nulifuwegejizukegorinik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3608/0285/files/pofibimojifudafol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7473/9607/files/20695267325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9516/2022/files/nobixorijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8868/2915/files/69913162279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6744/0290/files/wiguroluxusuxemekuferebad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7808/9878/files/93136983416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2523/6121/files/94239858970.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2558/8639/files/gulesir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6893/9672/files/66598752576.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_off00007441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7441 5172 bytes
SHA-256: 71e49f881417ea5fa440101d40b888ce0872bf23b671765bcbdc41959f7b3563
font_01_sfnt_off000085b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85B6 10088 bytes
SHA-256: 53deccad58bee1f09e235369c62144796d349bb2f81ad436f13918166c085c73

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