Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d5e33c4d2f793b…

MALICIOUS

PDF

63.7 KB Created: 2020-08-21 03:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b88ee56deeedcad4be235fd75f9716f9 SHA-1: 94b074499898c2dc750db124afb1eb9da1f6ce15 SHA-256: 20d5e33c4d2f793b219b5bb4d994572a066ba73e69be41e48d0a8bbdbb73d5f2
194 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple links, one of which, https://ttraff.com/pify?keyword=bluedio+i4+bluetooth+stereo+headset+manual+pdf, is flagged as a malicious redirector. The document body, though partially corrupted, contains text related to a manual and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous other PDF links, many pointing to Shopify, indicates a link farm strategy to improve SEO and potentially mask the malicious redirector. 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.com/pify?keyword=bluedio+i4+bluetooth+stereo+headset+manual+pdf In PDF document text
    • http://xamebaj.stannard.co.nz/uploads/1/3/0/7/130776525/5f38b3187.pdfIn PDF document text
    • http://files.graceyourspace.com/uploads/1/3/0/8/130874668/4333609.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/1/0436/2957/6352/files/algebra_problems_grade_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6815/4278/files/net_framework_2._0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4345/4102/files/xilafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9432/6944/files/87025054350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5308/8919/files/51960825972.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7618/0376/files/dizesogo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7475/4462/files/31430941729.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8404/5719/files/40157293156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/dirifaduzat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4030/1478/files/gunevetimig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/buselejedemuweter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/banking_terms_gradeup.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 5

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_off0000bb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB02 5556 bytes
SHA-256: 2c6df0ee92905637bc249e956021e51dafc9ae90dfb0527ceb55d6cb13d8df27
font_01_sfnt_off0000cdbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBB 10420 bytes
SHA-256: 2fb443b733a6fab12da3069399e4a4165edad12965f0ef0da4a750a986fc3ebd

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