Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d2ecf8e3fb8d418…

MALICIOUS

PDF

40.5 KB Created: 2020-08-04 22:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 398e5fe49429a965219719573ead0830 SHA-1: 0b65bf38dc8654b41cb4c585f47b3d76bedf0178 SHA-256: 5d2ecf8e3fb8d4186806cbf595beba488957a7253112babff8430f9c467c25db
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one critical heuristic identifying a redirector to a known malicious infrastructure. The document body and heuristics suggest a lure for free downloads, specifically a '9th grade biology textbook pdf', which is a common phishing tactic. The ML classifier also strongly indicated maliciousness.

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=9th+grade+biology+textbook+pdf+prentice+hall In PDF document text
    • http://files.senoritacinema.com/uploads/1/3/1/3/131398251/nubogiriwe-timejixixug-sofodexafabogu-nadidasoza.pdfIn PDF document text
    • http://files.chicagoschoolofgrappling.com/uploads/1/3/1/4/131409170/312064.pdfIn PDF document text
    • http://files.jeecontentandcopy.com/uploads/1/3/2/6/132681033/a712e4a3ab.pdfIn PDF document text
    • http://files.staceygschwartz.com/uploads/1/3/2/6/132682819/b5fe75b.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/1/0434/2926/5574/files/454626453.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0123/4076/files/todosemutumekudu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7539/3944/files/weekly_planner_2020_20.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sujaxitedidubabupopivup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4630/4920/files/70721226640.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4115/2421/files/2682000070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2093/5590/files/rapidex_english_speaking_course_book_in_urdu_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4046/4281/files/55755206549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7940/1632/files/ziwiniziximuxuguwezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7511/6961/files/64692681975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5462/7993/files/dobevuvigupalivu.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_off00005f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7B 5672 bytes
SHA-256: bfb1cd3c88b0349196fd692cdee8a5e59d96e5673501e3afae89812298b9e626
font_01_sfnt_off000072cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72CB 9964 bytes
SHA-256: 3bc25ba860316a4013994cbbf1a394506c50c04e530dfc5454be4d1ed6c2e394

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