Malicious PDF — malware analysis report

Static analysis result for SHA-256 6acc21cbf0b3c2bc…

MALICIOUS

PDF

56.1 KB Created: 2020-07-30 07:25:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bcc5b42febab5910579f36f724c69e84 SHA-1: e8ee62ab4c12950ef2efe15ef2345f4e010e3912 SHA-256: 6acc21cbf0b3c2bca70e786831cedbc31a4d977721f1dcfa1f7b220dcab9d7ac
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'questoes analise combinatoria enem pdf', suggesting a lure for educational content. The primary malicious IOC is the redirector URL, which is likely used to host or deliver a secondary payload.

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=questoes+analise+combinatoria+enem+pdf In PDF document text
    • http://files.lifeindustries.org/uploads/1/3/1/4/131437376/zikubijob.pdfIn PDF document text
    • http://files.cafe52nerima.com/uploads/1/3/1/3/131378943/fikiwedelifipot_nivibuxeviw_falosure.pdfIn PDF document text
    • http://files.soyouthinkyoucancatfish.com/uploads/1/3/2/6/132681307/ratilugorore-matoriwixa-podos-kirenovapatadaz.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/1/0431/2465/4241/files/54963802525.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7949/0968/files/wojobarunafuzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/dukevasowelebe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/pumijigugixulakovoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6881/7562/files/73332285314.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/97703120441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9482/7415/files/15082571961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3716/9576/files/rikasudofe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96951977507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/67343539034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9275/5103/files/daguv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2745/5400/files/21176544173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6277/1358/files/4036023329.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1312/8871/files/96507374788.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/tilamojexovenev.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 4

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_off00009e4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E4F 5384 bytes
SHA-256: 27d0fc921608545ae36c7abf8becc49c1dba3475df783034481b94a332b84c7b
font_01_sfnt_off0000b071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB071 9976 bytes
SHA-256: f889be2480ac90f164e38aa031bd231b8719570f7b81fd4151398b61da96682f

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