Malicious PDF — malware analysis report

Static analysis result for SHA-256 472c89c07d0d61a6…

MALICIOUS

PDF

35.9 KB Created: 2020-08-09 12:32:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a75cd25e67a9c7e7e25cd0aacee68425 SHA-1: 4deb5ef21aad3bad6732316bc71934f78ac1ad60 SHA-256: 472c89c07d0d61a65e0238b835c12a688b56d103ad27c5ec3e68b6c1c502f98f
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to what appears to be a link farm designed to mimic academic resources. One prominent link, 'https://ttraff.ru/pify?keyword=introductory+mathematical+analysis+for+business+economics+and+social+sciences+pdf', is flagged as a malicious redirector. 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.ru/pify?keyword=introductory+mathematical+analysis+for+business+economics+and+social+sciences+pdf In PDF document text
    • http://files.ringettegoalies.com/uploads/1/3/1/1/131164573/310de42a46f.pdfIn PDF document text
    • http://files.artbysarabardin.com/uploads/1/3/0/7/130776602/gusimorutojemuro.pdfIn PDF document text
    • http://files.telderberries.com/uploads/1/3/1/4/131406659/zawilit_nexodesawuguri_ginezunuluvi_daladakusama.pdfIn PDF document text
    • http://files.louisburghistoricdistrict.com/uploads/1/3/1/3/131383977/lapomumusel-renuj.pdfIn PDF document text
    • http://difarur.torysvintagesleds.com/uploads/1/3/0/8/130874330/guwelesexet.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/1/0429/8889/6415/files/ahs_season_6_online_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19441108854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5802/8959/files/rukukowelenitezudezobiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/15936325417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6842/3334/files/93220203679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/11240257564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5267/6773/files/32811504956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/segelof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6285/2773/files/90300449659.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 5

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_off00004e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E4A 5576 bytes
SHA-256: 278384e39e859b5e431667a281df7211de127d891e01c333b8b6fd2541714e2f
font_01_sfnt_off00006111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6111 9676 bytes
SHA-256: 2225a50b21ec90c76e3110f60c95889037e8576f6a32fb49770f91854c849cd1

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