Malicious PDF — malware analysis report

Static analysis result for SHA-256 1605ba009e4cbd3d…

MALICIOUS

PDF

40.6 KB Created: 2020-09-29 18:58:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cffadbf3e5fce0dcd2354cd112d32a31 SHA-1: d6e5f914dfa4801321932bf4416c4545fb8a0681 SHA-256: 1605ba009e4cbd3df35a13fba791776694b011e294f3eb63f0fec5318570f4d9
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to SEO-optimized PDF files, designed to appear as legitimate downloads. The primary link, however, redirects to known malicious infrastructure at cctraff.ru, indicating a phishing or malware distribution attempt. The ML classifier strongly supports the malicious verdict.

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://cctraff.ru/strik?keyword=pemeriksaan+ballard+score+pdf In PDF document text
    • http://files.jennysdelights.com/uploads/1/3/1/1/131164476/d69aad3d476.pdfIn PDF document text
    • http://tufowo.katiebielefeld.com/uploads/1/3/1/8/131856713/3795163.pdfIn PDF document text
    • http://files.theapostoliccommunion.org/uploads/1/3/1/0/131070792/6551103.pdfIn PDF document text
    • http://dosozogaz.goldaes.com/uploads/1/3/1/3/131378950/606088.pdfIn PDF document text
    • http://files.katoutofbag.com/uploads/1/3/0/7/130739204/lobomuwonamawaded.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/1/0437/6975/7850/files/angry_babies_malayalam_movie_songs_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7304/4634/files/life_cycle_of_a_bear_ks2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3391/0681/files/vosojofikumodavonosijaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5029/4687/files/medios_de_produccion_feudalismo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5825571d-dc19-4c10-81fe-95e765cead78/dukonagugiboxopivifizorog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62e1bee1-3785-4b9f-add3-ea132fe8fcdd/gixiwamijupemugitorawavaj.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000603c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x603C 5504 bytes
SHA-256: 7751bd04924c3f7d8ea995d1f11907921ce8623e1f0c4356140c1149a5c92923
font_01_sfnt_off000072da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72DA 10316 bytes
SHA-256: d55e34ec84bb2b0cdd61bb3b5e4e3107b0fda6174c9088d91c448d32d49a5a42