Malicious PDF — malware analysis report

Static analysis result for SHA-256 37f4dda4d09b919c…

MALICIOUS

PDF

41.6 KB Created: 2020-08-12 17:04:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c2a14ab546295a6535c66908f3421924 SHA-1: 2337ee6b8c1233389fd71e22f919ba3a1a712f1e SHA-256: 37f4dda4d09b919ccc4a9bdc5e625e8a87e0f65779befaad3081b13184e07dd5
194 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm designed to manipulate SEO. The primary malicious URL identified is ttraff.com, which is known to host redirectors. The document body contains a mix of seemingly legitimate text and embedded URLs, suggesting a lure to attract users to click on the malicious links. No scripts were extracted from this sample.

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/wb?keyword=tipos%20de%20liderazgo%20tesis%20pdf In PDF document text
    • http://files.jesuitapush.com/uploads/1/3/0/8/130813317/walome-sefukabekewusef-vebaralanoguxel.pdfIn PDF document text
    • http://files.toyourjoyaromas.com/uploads/1/3/0/8/130813357/1809611.pdfIn PDF document text
    • http://files.bustihistoricalsociety.com/uploads/1/3/1/6/131606727/fdd63.pdfIn PDF document text
    • http://files.katherinedolen.com/uploads/1/3/2/7/132740288/a66ee.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/1/0429/8306/3715/files/periods_of_english_literature_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/lirufadod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4659/0872/files/digital_electronics_projects_for_engineering_students.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/seworaletig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4663/2615/files/action_plan_steps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1174/2628/files/pdf_econometrics_of_financial_markets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9515/4070/files/xuvarotagigerobosavuzuxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/1357/5580/files/origen_real_del_nervio_facial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/filariasis_usu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/77396746993.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7555/9829/files/sazabababof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0310/1863/files/xetobanidoxepukev.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 8

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_off00006374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6374 5208 bytes
SHA-256: 3cccfff662fb46eb624e429b5dc79645424284a31f6143ddafa35c85c7fb38e8
font_01_sfnt_off0000753d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x753D 11068 bytes
SHA-256: fac59dc5e7554451b4f1030e1567c86753231500ab639968ecc18bedc37fc34e

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