Malicious PDF — malware analysis report

Static analysis result for SHA-256 f633521df0ef523c…

MALICIOUS

PDF

41.0 KB Created: 2020-08-20 20:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bb03f540a4e56475de845b43173568f8 SHA-1: 845280242c0872faedc0041c17985d9b82f0fa28 SHA-256: f633521df0ef523c70d9d16345ab30386d409a061ed3a10d50c5d0e22e20344c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a free printer adjustment program. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms that the link at https://ttraff.com/pify?keyword=printer+adjustment+program+free leads to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which point to benign Shopify URLs, but the primary malicious link is clearly identified. The ML_NYX_PDF_MALICIOUS score further supports the malicious classification.

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=printer+adjustment+program+free In PDF document text
    • http://xawepur.shandsschool.org/uploads/1/3/0/7/130776819/6fec18fe19ca.pdfIn PDF document text
    • http://files.sweetspotstrategies.com/uploads/1/3/1/3/131384340/7641531.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/1/0431/3550/0439/files/embedded_linux_booting_process.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9926/8003/files/kixaluwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/4040/3619/files/tatalaksana_ascites.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3123/9588/files/polukitebevenon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0258/5500/files/faxetadekagelomew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9664/5538/files/acis_and_galatea.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2926/4546/files/linunegufarasatakatonanel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0896/2210/files/causes_and_effects_of_noise_pollution.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9087/7339/files/ataxia_postinfecciosa_pediatria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/54258633088.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 7

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_off000058e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58E8 5404 bytes
SHA-256: 7f3cdbb05243311a79a282595fb31ba4fc3e710a48478795685351b51f5578ba
font_01_sfnt_off00006b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B35 15792 bytes
SHA-256: 60d3726f64f454da3b0b17ae58c0f70c19e2ef47c604c5cb9166e8ec7acc7078

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