Malicious PDF — malware analysis report

Static analysis result for SHA-256 399bb6345539e86e…

MALICIOUS

PDF

42.2 KB Created: 2020-08-21 14:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1af4c11836e8e1df8b4a157c2b0db72b SHA-1: 5bf7cc33091d4231e56c5a0078774ac00af9745a SHA-256: 399bb6345539e86edb8dd4ed9c4b5d845cbc65cee3fa93ba7b2750d2bf1e0342
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and URLs, including the redirector URL 'https://ttraff.cc/pify?keyword=amaranthus+caudatus+pdf', suggesting an attempt to lure users to a malicious site. The presence of numerous Shopify-hosted PDF links, while some are benign, is characteristic of SEO poisoning or link farm tactics to distribute malicious content.

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=amaranthus+caudatus+pdf In PDF document text
    • http://files.doresangha.com/uploads/1/3/1/3/131381003/8189749.pdfIn PDF document text
    • http://tezigigot.davidcunninghampolisci.com/uploads/1/3/0/7/130740514/lowurupujusuvo.pdfIn PDF document text
    • http://files.whitehorsevenue.com/uploads/1/3/1/4/131483009/5515ac98.pdfIn PDF document text
    • http://ditejujad.artattoo.co.uk/uploads/1/3/1/1/131164250/bakuxabog.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/1/0433/0687/7080/files/38970143778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0485/3402/files/meviduzuxiwiwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0886/0065/files/gikoda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/pixuworuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2782/3778/files/50725098849.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6338/6017/files/pdf_file_online_edit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8999/1582/files/make_bootable_usb_mac_windows_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8442/1022/files/python_string_replace.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/mean_value_theorem_calculus_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8374/0822/files/last_day_on_earth_guide_dog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4848/5535/files/23125661423.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_off0000680a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x680A 5352 bytes
SHA-256: 95ea1b47d5a6dc654ab951c6995500ee989ecebe99f1c462067d6413b74eb4f2
font_01_sfnt_off00007a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A06 10048 bytes
SHA-256: 4ed16872b39f98cb2b84f8ca9cc674156b61cc8dc393d60f448c0ee2f45aa458

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