Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb87128c800751c7…

MALICIOUS

PDF

36.5 KB Created: 2020-08-21 00:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4bfe193db0db0f05c66137082391de43 SHA-1: 796776d31616c52555c848b485a31cdd82ca09dd SHA-256: bb87128c800751c7c1e28d47d476998f0f3a66fc0f8f182322e52ab559819f0b
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.ru/pify?keyword=free+alto+sax+sheet+music+jazz', is presented as a lure for free sheet music. The PDF also contains a large number of external links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link disguised as a document resource.

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.ru/pify?keyword=free+alto+sax+sheet+music+jazz In PDF document text
    • http://files.rpmiddleschool.com/uploads/1/3/0/7/130740586/jijexarobiwanu_tuwovulejumo_tofovapis_rirufuwusinebor.pdfIn PDF document text
    • http://murekow.buckmtnmaplefarm.com/uploads/1/3/2/7/132712109/a12d2ab88b349e.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/1/0428/1679/8886/files/indesign_product_brochure_templates_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65939759823.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4496/1436/files/tomojanumejonufolav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0956/3045/files/desactivar_advertencia_de_uso_de_datos_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/23098549828.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/cognos_report_studio_concatenate_fields.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5293/3021/files/furusujasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9679/2471/files/bagizebulazopemefetav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5049/2323/files/66503274574.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0149/4179/files/html_to_javascript.pdfIn PDF document text
    • https://musescore.com/usIn 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 1

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_off000048d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48D4 5188 bytes
SHA-256: cde382602c9c8392d141e607195c3aa3f174aa2e2a2b45b9f8f9cbd9c32ed163
font_01_sfnt_off00005a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A61 13492 bytes
SHA-256: 3f9c94eb38dbbce6c1e9004bcb8e2d5a267becb294ab87980f320995f6dfe394

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