Malicious PDF — malware analysis report

Static analysis result for SHA-256 356ef43f9b4bc162…

MALICIOUS

PDF

42.3 KB Created: 2020-08-01 20:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b515d00706bafb5078da1ec3c4dc4f71 SHA-1: ef74498c9d341fe9bee0f89627a055c86605a5b9 SHA-256: 356ef43f9b4bc162c42082a4fd3c601df45997bc744ccde0f08a86b34649461e
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link to 'https://ttraff.cc/pify?keyword=weather+channel+95531'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates an attempt to create a link farm for SEO manipulation or to distribute further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=weather+channel+95531 In PDF document text
    • http://files.qualitytutoringservices.com/uploads/1/3/1/3/131380308/mopozexasepugatusag.pdfIn PDF document text
    • http://files.cockburnarchitecture.co.uk/uploads/1/3/1/8/131856195/kukuvadumonododoso.pdfIn PDF document text
    • http://files.arnoldroad.org/uploads/1/3/1/6/131636682/ca56fd6.pdfIn PDF document text
    • http://files.straymongrel.com/uploads/1/3/1/8/131871894/4cc60b638a0f8e.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/1/0430/2651/4077/files/beyonce_lemonade_download_mp3_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8678/2369/files/9925161665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zixetirubopejama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9139/3698/files/felugorawazakabonepoze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3745/6534/files/suvivivel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4346/1032/files/coleman_powermate_6250_generator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8867/4967/files/20734736404.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0440/3613/files/66669268650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4920/5405/files/36452153776.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3614/5814/files/81093832605.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7530/4612/files/tekupage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3695/9139/files/jugisowogetib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9561/1810/files/busimukokod.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_off00005e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E41 5216 bytes
SHA-256: 18e858dd855bc0fcc75d8b325ae95e8053c9379ed7353f1d728c4139908fdb5c
font_01_sfnt_off00007013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7013 14112 bytes
SHA-256: 59b75d56e1064838a03b2df47f4246e9db0823c234a01eb981959f28a27dcb7e

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