Malicious PDF — malware analysis report

Static analysis result for SHA-256 185b32cea404490f…

MALICIOUS

PDF

40.2 KB Created: 2020-08-12 02:19:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0e7bc7540e38cb1ac506193c0d5dc9d6 SHA-1: 098c5393027b615c2ac2ef094553d3be4ab1b77a SHA-256: 185b32cea404490f14be7cd6a7d088dfdbcf01ae0574cb678e268bc0f4ffadbb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service at 'ttraff.com'. This service is known to host malicious content, and the PDF's structure suggests it's part of an SEO link farm designed to lure users with deceptive content. 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=animation+meaning+pdf In PDF document text
    • http://files.perturbmusic.studio/uploads/1/3/1/4/131453560/9ec9b8707.pdfIn PDF document text
    • http://demos.southkeyscentrum.com/uploads/1/3/1/4/131408738/4850007.pdfIn PDF document text
    • http://files.cksdrumshop.com/uploads/1/3/1/8/131856277/1b6b948a39.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/1/0431/1266/1152/files/52924368521.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/bitinek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8305/5782/files/58899801589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5376/0162/files/87711333122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2257/1930/files/60694498523.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5481/5640/files/35896450792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4058/7423/files/bunga_belimbing_wuluh.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0231/3373/files/pajigozuxusivejiwubufigem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5144/9496/files/soxemepuxixavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5525/9546/files/streamline_english_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9898/7941/files/download_photoshop_cs5_full_crack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5757/7122/files/16266697946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/27940239705.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 1

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_off0000615c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615C 5044 bytes
SHA-256: e0ced36da2a65a6fa996c7f4bb6126715efed56eedd60f48fdaf3261e86c7937
font_01_sfnt_off00007273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7273 9756 bytes
SHA-256: 6dbda76809b56774ba97847dec30fa82837b809fff2d8aa2e1a4871cbaef9490

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