Malicious PDF — malware analysis report

Static analysis result for SHA-256 55856f5b09958ec9…

MALICIOUS

PDF

71.5 KB Created: 2020-08-21 01:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1bd73ac07d31b40e2261d1a9572c74f4 SHA-1: 87fd109c696b4f423be6de7c4b796e9ff82f166a SHA-256: 55856f5b09958ec9275b9b3f7c12e124060144e26c90377c7f91a78228bb423a
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document also features a large number of embedded links, many pointing to shopify.com, which is characteristic of SEO link farm techniques used to artificially inflate search engine rankings for malicious sites. The ML classifier strongly indicated maliciousness, supporting the presence of these suspicious 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.com/pify?keyword=asuran+songs+starmusiq In PDF document text
    • http://files.killjoy.info/uploads/1/3/2/8/132816158/444fa6d86d0810f.pdfIn PDF document text
    • http://files.heathercarreiro.com/uploads/1/3/1/4/131483201/pubesezox-bupulidonope-fikarufi-pezoriwibifumod.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/1/0433/7994/9718/files/add_splash_screen_xamarin_forms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/22146034649.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0727/0312/files/minecraft_failed_to_login_invalid_session.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1871/4264/files/70174280242.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/piwabemisagaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8903/4402/files/53167588232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/xonijivepozegibolivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71409998288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4327/3369/files/43265574340.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1263/5299/files/minutes_into_days.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_off0000d4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E7 5088 bytes
SHA-256: b7f4db74ec958d7b38c998155c7de88d84acecd64f183655bf539af177814029
font_01_sfnt_off0000e61a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61A 14068 bytes
SHA-256: 2ebce2e813e5cb0e3c47517be204398242eafe15ddb596d70882654516a44b22

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