Malicious PDF — malware analysis report

Static analysis result for SHA-256 016b4fe850aff128…

MALICIOUS

PDF

41.0 KB Created: 2020-08-06 23:31:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 096fa8c4ac15d32a9142c224d9551320 SHA-1: 373b233f979e7f229a6a4d6e1d020a8ee52a9d9c SHA-256: 016b4fe850aff1288411a18a70b875ff5d5cccd6f7460fa50c4651a3e2fbd989
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service, suggesting a link farm or SEO manipulation tactic. The primary redirector URL is identified as malicious, indicating a phishing or scam attempt disguised as educational content. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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.ru/pify?keyword=acids+bases+and+salts+notes+pdf In PDF document text
    • http://files.academyonegoalkeeping.com/uploads/1/3/2/6/132681664/3856476.pdfIn PDF document text
    • http://files.sunshinestudiosonline.com/uploads/1/3/0/8/130815277/f13e5.pdfIn PDF document text
    • http://vakabi.faubionmiddleschool.com/uploads/1/3/0/7/130739553/479404.pdfIn PDF document text
    • http://files.termarkleather.com/uploads/1/3/2/6/132682665/85b01c3aa355523.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/1/0441/0903/7720/files/kobra_red_dot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6577/8080/files/96545628902.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xarapidarobumebavo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3463/2607/files/fuxawulamuxixopufipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41230052817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4054/6714/files/70500979863.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3825/2954/files/fisigogowewokokeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/89704608751.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9946/2558/files/revistas_arqueologia_mexicana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5062/2358/files/best_books_to_read_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0155/1771/files/nulitilugoguforomib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5475/9065/files/vizolowa.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_off00006352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6352 5184 bytes
SHA-256: e0b273250c9a0a1e45502daa213e2ed24dd0958a484aae0ffe892368c23ac774
font_01_sfnt_off00007509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7509 9964 bytes
SHA-256: d28685cbc7f205a8a926517beda39e90ef14f9edbb2b29f992ad43c950acaf43

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