Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b54b66c10bcd495…

MALICIOUS

PDF

43.9 KB Created: 2020-08-03 07:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b1eea17f2ac0fe7b199ce76daec3d831 SHA-1: a8eff2ee712ea03b3359cf7ae594dfac8d525396 SHA-256: 4b54b66c10bcd495a93c593292d6b8917cd62aeee55a5503369f04988a100eec
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary malicious redirector URL identified as 'https://ttraff.cc/pify?keyword=mac+tts+voices'. This URL is likely used to direct the user to a malicious site. The PDF's content, though heavily obfuscated, includes references to 'Mac tts voices', suggesting a lure to entice clicks. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=mac+tts+voices In PDF document text
    • http://files.angryblackwomyn.com/uploads/1/3/0/9/130969322/ranomopizilusata.pdfIn PDF document text
    • http://files.summasportswear.com/uploads/1/3/1/4/131453807/118d8e22a22790b.pdfIn PDF document text
    • http://files.beginwithyourskinmedspa.com/uploads/1/3/0/7/130738484/kulamamuf-dosulu-guzan-tadexebewolifed.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/1/0427/8052/4710/files/74463642220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4196/3683/files/3x3_inverse_matrix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2327/7973/files/tosesosopajotisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4251/2797/files/viper_479v_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7407/6315/files/navy_advancement_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3751/4133/files/wekixokajuruvutesopepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9436/7649/files/dolupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5188/4445/files/5364270088.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3747/4466/files/28995917548.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6869/4432/files/fomezanokonopujob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7161/8723/files/25546258520.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/kuxutirizomifuna.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_off00006d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D49 4732 bytes
SHA-256: 90ba89130c4ec548f95941f3f2cea5b7c9b36b3dd03541c3443f1199e3ca4fa5
font_01_sfnt_off00007d86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D86 10912 bytes
SHA-256: 0f308bd2a29b4c00c9cfd85ef2cb7af2d6e6aa9089fe56aa224cfdb2bec4d413

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