Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4a2637f36204a05…

MALICIOUS

PDF

37.1 KB Created: 2020-08-14 15:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8ea891afd1c99e6e18d4f84d18f30640 SHA-1: 0c6f4b04caa0f86fd0e579f4ba64593d46f45bdd SHA-256: f4a2637f36204a057fad8d529ad6b897fce002b3999c6d9a617827f570181c3e
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains the same URL and a reference to 'cpr guidelines 2018 uk', suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, likely to obscure the malicious redirector.

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=cpr+guidelines+2018+uk In PDF document text
    • http://files.synergymhs.com/uploads/1/3/0/9/130969185/1305e6c4db5efb9.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/1/0448/1653/1617/files/brew_install_mysql.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2157/4044/files/administracion_publica_descentralizada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/2020/2663/files/logewodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0964/5478/files/xujurefadabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4673/9868/files/power_of_speaking_in_tongues.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/bajegalok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6133/6471/files/54320294980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42539854631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7832/7203/files/data_structures_and_algorithms_made_easy_5th.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
🗂 Part of campaign: baybat-edtech.com 4 samples

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_off000053d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53D7 5408 bytes
SHA-256: 41f04531b734b3de9b22f169bc76c1952576cb878647371d69c2e2bc25e49567
font_01_sfnt_off00006654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6654 9916 bytes
SHA-256: b5829559ddd69f996ba7d48b0381ecd7a91ad6a060364f49efc825567d133731

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