Malicious PDF — malware analysis report

Static analysis result for SHA-256 88b99026e3724500…

MALICIOUS

PDF

47.2 KB Created: 2020-08-06 10:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0e36ad2efdccc5ffdee2b61af1025e30 SHA-1: 95e4f6f38bd3134483868bd32f758384c217edb9 SHA-256: 88b99026e372450035acc37cbaa682a3904080e85218e769c0f128951a290bbd
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which are hosted on domains associated with redirectors and SEO link farms, indicating a malicious intent to distribute further content. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs pointing to potentially harmful redirectors supports this assessment. The document body, though heavily obfuscated, contains URLs that are likely part of 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.com/pify?keyword=electrical+engineering+basics+question+and+answers+pdf In PDF document text
    • http://wotogaxan.medpixel.net/uploads/1/3/2/6/132681670/f05c23.pdfIn PDF document text
    • http://files.trancityevent.com/uploads/1/3/1/4/131483267/zamuvemadabov.pdfIn PDF document text
    • http://files.natureofchemistry.com/uploads/1/3/0/8/130874110/a036745.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/1/0434/6406/5174/files/78640374776.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7725/5836/files/70902248274.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9955/3959/files/59668868598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9378/4728/files/75030404564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/lukokugatukekuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6982/3383/files/61614692421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8892/8150/files/xitavirekixujolodujijoro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/gufok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8830/6586/files/jumitotedir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9461/4940/files/basketball_tryout_evaluation_form.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68EF 5520 bytes
SHA-256: d31c7260fba49246d8949cb359a372b1a5a418a3b6f0032f5351d575ef494fa4
font_01_sfnt_off00007bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBB 11112 bytes
SHA-256: 7071682cb746b0d4dbc98f560a2154608dec7f740b2bd140e0c2e722c475ce5e
font_02_sfnt_off0000a171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA171 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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