Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b2ca3d240e80e29…

MALICIOUS

PDF

59.0 KB Created: 2020-08-21 20:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 025c0763aa2e708ec26e8c247646fd28 SHA-1: 0ee556f85a066e2f90dce94e1ab5754633fad77f SHA-256: 1b2ca3d240e80e29705af6c3bf9de4b4ad2de1a5a5c95dd501de600b4267f88c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised as a Castlevania 3 manual. This heuristic, combined with the ML classifier flagging the PDF as malicious, strongly suggests a malicious intent. The document body, though heavily obfuscated, contains the URL that is also flagged by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The PDF also contains a large number of external links, indicating a potential link farm or SEO abuse for malicious purposes.

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=castlevania+3+dracula%2527+s+curse+manual In PDF document text
    • http://files.maggieclapis.com/uploads/1/3/0/8/130814636/755eb.pdfIn PDF document text
    • http://files.northpointpsychology.com/uploads/1/3/1/4/131453194/4bd2ffe0e.pdfIn PDF document text
    • http://jorosef.anti-agingbyrjxjelly.com/uploads/1/3/2/3/132303354/8686563.pdfIn PDF document text
    • http://files.nbltwowayradio.com/uploads/1/3/0/7/130739081/pepamox-xigonevuxokal-vekudizif.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/1/0431/2704/6301/files/30463557153.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1822/2753/files/ancylostoma_braziliense.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8937/1044/files/vemonapiravabunimogoboxon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2083/6254/files/braniff_airlines_pucci_uniform.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/jifijezetinete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3731/0626/files/astm_a534_04.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/6133/1356/files/besharam_300mb_movie_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2201/4885/files/upsc_anthropology_syllabus_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2305/4501/files/ct_ghp_trong.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9998 4724 bytes
SHA-256: 9af09b3b78453117e7a1ae7c3035050dfa79cebfe96514728ce7a19b9fca31b0
font_01_sfnt_off0000a9e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9E0 5248 bytes
SHA-256: 92ea88554ce2928999ac780134a91c03a6c66f2a08f28d96d3fd370cc59ef80f
font_02_sfnt_off0000bba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBA8 10192 bytes
SHA-256: 16263b66f5b97c45428097f89fbca4373848e4f74472c0aa719a84ef15e32e31

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