Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4a2ee5cc83300f5…

MALICIOUS

PDF

43.2 KB Created: 2020-08-21 16:26:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cb08385b8e7ed8ea178614dcb2968713 SHA-1: c9090d9ebe0b37815940289dbcb69a962eb01b45 SHA-256: a4a2ee5cc83300f535d83f3728bbe956ded0530dfd594e4062c4fe74eaa3e186
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, also contains URLs that appear to be part of a link farm, likely intended to deceive users into clicking through to malicious sites. The primary attack pattern involves luring users to external sites, potentially for further exploitation or credential harvesting.

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=logo+brazil+dream+league+soccer+2019 In PDF document text
    • http://files.glosterbaptistchurch.com/uploads/1/3/1/1/131164009/6640189.pdfIn PDF document text
    • http://rezegi.wilmcommunityadvisorycouncil.org/uploads/1/3/0/9/130969559/kedinu-nivipuwunukelet-kaludofomapi.pdfIn PDF document text
    • http://files.richardmccooey.org/uploads/1/3/1/8/131857679/bipunimo-bivare.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/1/0433/6202/5626/files/parasitologia_humana_neves_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4246/2106/files/38650516308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/62489421501.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3449/9493/files/vic_school_calendar_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0631/1070/files/kabunerowagaful.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6901/3157/files/72766628467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/8466/3208/files/gitazeronakuvab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1818/2041/files/ielts_speaking_part_2_topics_with_answers_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9648/9632/files/jotuziwujuvemefowaxakaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4872/2851/files/86616881239.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000555f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x555F 5568 bytes
SHA-256: 4f7c4ab337a21f0c8051c74a8fca4e5bf75486b9a6ffe1120bce9bac44af23ef
font_01_sfnt_off00006855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6855 13220 bytes
SHA-256: 1a3c354c3e6747053ea385a6df9cf1cbd766e806abb5c28e94acd0a3dd2bdcee
font_02_sfnt_off0000921e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x921E 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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