Malicious PDF — malware analysis report

Static analysis result for SHA-256 399908ecd3a4b34a…

MALICIOUS

PDF

35.5 KB Created: 2020-08-08 05:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7f52dbf466d4252fc752ca95caaab7be SHA-1: eda9cebda41c0cc1d99450b55f8c47c615e2d313 SHA-256: 399908ecd3a4b34aa653481ade025b0bc7cf448ef440a41f37f50cea388f6532
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify'. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect the user to malicious content. The file is classified as a malicious redirector due to the presence of these links.

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.cc/pify?keyword=opposite+words+in+english+for+class+1+worksheets+pdf In PDF document text
    • http://files.nativetwiststudio.com/uploads/1/3/1/3/131384468/buxikewi.pdfIn PDF document text
    • http://files.diaryofacancerresearcher.com/uploads/1/3/0/7/130739322/zogofugal.pdfIn PDF document text
    • http://files.ameridragonsports.com/uploads/1/3/1/0/131070938/76089.pdfIn PDF document text
    • http://files.constitutiondaycentre.org/uploads/1/3/2/8/132814146/duwuxok.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/1/0429/9603/9839/files/20971079069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9952/1178/files/mopig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7070/8129/files/27039554217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/vazuderuturat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0602/5128/files/82676542268.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7365/9292/files/kixananutefix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7748/4196/files/how_to_reinstall_graphics_drivers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/zibamajewozowejilibasidi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7723/8945/files/pyaar_ke_side_effects.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4991/8374/files/45759368015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1423/4016/files/59633565933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/99413027910.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8349/7623/files/limepu.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_off00004c09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C09 5652 bytes
SHA-256: b5c52a9514e16359997aea3099dc63abf1786bd739c653cf24dd5548578c8d1c
font_01_sfnt_off00005f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F50 9948 bytes
SHA-256: 4d8b6394e18c5a1e6767833122cda09e4e7c3102b60cfbca2af1cc90d014e0cd

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