Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8f38e9bf2a07aa9…

MALICIOUS

PDF

47.1 KB Created: 2020-08-11 22:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 440005163a7396b24f513ed27bb6dc47 SHA-1: d580af358bcc1b5a6e9fcf307cf7997d0e66b78c SHA-256: b8f38e9bf2a07aa9bac9f6eecaeb8dd5ff457af70d07cba08b0a549796781237
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as sheet music, which leads to a link farm. The document body, though heavily obfuscated, contains the primary malicious URL. The presence of numerous external PDF links suggests a tactic to distribute malicious content or engage in SEO manipulation for malicious purposes.

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=careless+whisper+sheet+music+alto+sax+pdf In PDF document text
    • http://mokuwus.cruiserpower.net/uploads/1/3/1/1/131164250/4840479.pdfIn PDF document text
    • http://files.abstractgames.org/uploads/1/3/0/9/130969151/nenikutuvo-zipiso-kedipun.pdfIn PDF document text
    • http://files.archelps.com/uploads/1/3/1/6/131636762/tisuwoxuropu_nutexuxo_favuditupagazun_savedezu.pdfIn PDF document text
    • http://jidoxezi.vintagefarmsuds.com/uploads/1/3/2/8/132816202/8194759.pdfIn PDF document text
    • http://files.slhclumber.com/uploads/1/3/1/4/131406344/1069643.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/1/0435/5214/5560/files/dimozejagogujipaku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9048/5150/files/luwuzugidedu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7977/7952/files/39190373896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vujunuvitiwowus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/human_anatomy_and_physiology_b_pharmacy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2897/0652/files/sbi_internet_banking_registration_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6518/0321/files/96113321590.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5313/8591/files/51755689723.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1117/8649/files/all_algebraic_identities_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/57060083422.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 3

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_off00006ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC5 5460 bytes
SHA-256: 2f137bc9a935a29e85c4a8b74f9fa249751113008d87cc396a1e6bb183484692
font_01_sfnt_off00008148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8148 14568 bytes
SHA-256: 2fd93aef1041214ee7a060c774bcae4cdf2d116226b42a75269dd0b6ca4fdfc3

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