Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a73220cc184bb56…

MALICIOUS

PDF

43.7 KB Created: 2020-08-24 03:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: be98ec515176055fbf8afca395cae737 SHA-1: 380146bd88c1d2770eb74b1040cdc03f985b38d9 SHA-256: 4a73220cc184bb5642381ba420502561542dbb6f419ab150580ec97a1c92e918
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a reference to the malicious URL, suggesting a lure to trick users into clicking. The presence of a link farm and a malicious redirector indicates an attempt to distribute further malicious content or conduct phishing.

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=cateye+strada+wireless+manual+cc-+rd300w In PDF document text
    • http://xafewiz.alexrawfootage.com/uploads/1/3/1/6/131606289/4694009.pdfIn PDF document text
    • http://kapoli.brokenspanishmarket.com/uploads/1/3/1/4/131437826/jativa.pdfIn PDF document text
    • http://files.milightning.org/uploads/1/3/2/3/132303248/wiratepanev.pdfIn PDF document text
    • http://files.anstrutherlifeboat.org/uploads/1/3/1/1/131164574/bomafivi-fovapit.pdfIn PDF document text
    • http://files.sonoma-chanson.net/uploads/1/3/1/6/131637814/zekugev-tasagefolufepu.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/1/0433/1533/1227/files/vocational_skills_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5451/1766/files/merge_command_line.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3929/3589/files/87361214934.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/1897/2318/files/1610329908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1081/7180/files/kejevabimufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6338/6017/files/selling_skills_assessment_questionnaire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/5873554830.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 6

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_off000068a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A9 5520 bytes
SHA-256: 694b9cf00d0df661fd0c00e58ea5ba7692f49a59c90390d4cc8a3f4f8804bd7f
font_01_sfnt_off00007b69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B69 11976 bytes
SHA-256: 6804cd4451dd37da0e56e0566834e6879592aa614cf902a2eaea4a9d0ecd423d

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