Malicious PDF — malware analysis report

Static analysis result for SHA-256 3425ca4870b3c066…

MALICIOUS

PDF

43.3 KB Created: 2020-08-24 06:28:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bdad1b0517041103045f056dda07668e SHA-1: 263b38be171cddbf6c910be93c3b6aca8b0658a5 SHA-256: 3425ca4870b3c066b31df307c745df78ed0b6fcc669949322dce93504ed2defb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to Shopify domains hosting PDF files, and one critical link to a redirector at 'ttraff.cc' that is associated with a lure for 'avast antivirus.exe free'. This indicates a phishing attempt to trick users into downloading malware disguised as legitimate software. 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=avast+antivirus.+exe+free In PDF document text
    • http://files.lesleehampelphoto.com/uploads/1/3/0/9/130969592/rukofofewevi.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/1/0430/2739/8807/files/aircraft_structures_for_engineering_students_5th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tutokufumetuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6903/1078/files/90389437580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4275/8056/files/kiwemipuzanolu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/93910496809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8332/4822/files/52821207896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6686/8383/files/neoclassicism_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/jejupinapodunaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2610/1910/files/74419851077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fupibi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7278/2489/files/sixopulovavuloke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4645/8776/files/cursors_io_cheat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6784/2459/files/dotijok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9269/5456/files/sustainable_development_goals_report_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9373/7118/files/zuxevu.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 4

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_off00006c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8D 4876 bytes
SHA-256: db4256a99280846d674f020c237a2042787dcdc7b6d353fbcb4573e20d5557b5
font_01_sfnt_off00007d3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D3F 10192 bytes
SHA-256: 737ca9fd5ce397679aa7c23b7d50e7c55dc82d77e494e5df943c5169aa391dd9

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