Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad36c857c04ad8aa…

MALICIOUS

PDF

46.1 KB Created: 2020-08-20 09:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d357b79edbd1957089f63c53e359db4f SHA-1: d1d83bc2016f4960ddd4ae2b1949a14a859ff071 SHA-256: ad36c857c04ad8aa69910d5ecc5d41bfdd208305905cf6674ad9f5647f1e77ad
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'cation exchange capacity' and includes the malicious URL, suggesting a lure to a site that likely hosts further malicious content or phishing pages. The ML classifier also strongly indicated maliciousness.

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=cation+exchange+capacity+pdf In PDF document text
    • http://pusiv.paintcakes4kids.com/uploads/1/3/2/3/132303382/5776993.pdfIn PDF document text
    • http://files.meltingtundra.com/uploads/1/3/2/6/132681771/libugabagigad.pdfIn PDF document text
    • http://jikelenur.missuniversevietnam2019.com/uploads/1/3/0/7/130739278/496a8.pdfIn PDF document text
    • http://fovor.miyakostudio.com/uploads/1/3/0/8/130813747/kozuveluzi-xosodezitex.pdfIn PDF document text
    • http://sewaduma.681group.com/uploads/1/3/0/7/130776277/d1fcd23468636.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/1/0440/0391/7974/files/72657190699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5992/9503/files/teachers_day_speech_in_kannada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/dead_or_alive_xtreme_3_digital.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/83108715915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3717/7494/files/vaxupezajoxolavosafaful.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4365/1735/files/regadogepowunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9103/3250/files/36231162360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/antibiotic_treatment_strategies_for_community_acquired_pneumonia_in_adults.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/wuzadoxebunuzokofedimajif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8460/1758/files/9773576066.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 2

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_off00007639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7639 5188 bytes
SHA-256: cb3a95255bc2f96585207359ac8e40a4abe718a0a5f40df9ccacf6b826cdefc8
font_01_sfnt_off000087ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87ED 10448 bytes
SHA-256: 4dcf5a604050b9fad8c0257e192d5b6bc4d650cb2ed0581134ae33714ca11581

Open this report in the interactive analyzer, or submit your own file for analysis.