Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4cb9b4e6433abd0…

MALICIOUS

PDF

43.7 KB Created: 2020-08-22 00:50:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 109649e0dae97dbbd15b38b242c7cc83 SHA-1: 8fdfd370c93d9bf83474571f83d2806c13cd2ec1 SHA-256: b4cb9b4e6433abd04dfa8008fb17b2682c14ec3d9b2f4ee453925557539931ad
202 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to Shopify-hosted PDF documents. One of these URLs, 'https://ttraff.cc/pify?keyword=original+baybayin+font', is flagged as a malicious redirector. This suggests a campaign aimed at distributing malicious content or phishing users, leveraging a large number of seemingly benign links to obscure the malicious one. The presence of a 'download button' heuristic further supports a lure-based attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=original+baybayin+font In PDF document text
    • http://files.justicefordrew.com/uploads/1/3/1/3/131384709/fowoxitizuwobudu.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/1/0436/3531/0745/files/ghost_evp_analyzer_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8288/4006/files/joretamubatomufixejuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/18986152718.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9789/1751/files/30156707039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6529/4504/files/ansiedade_autocontrole_augusto_cury.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4501/8017/files/31745614060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0271/4536/files/missed_abortion_journal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/zonepejuwukaduduxip.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5901 5024 bytes
SHA-256: e76342d2588a2b01400f3fb8971f10bf5df8ad3f5978c9f94a30df1dfe282fb1
font_01_sfnt_off00006a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A30 10356 bytes
SHA-256: 3fab90b432513c6d50e9409d53189b73507a3cc00055928330676365800b9c9b
font_02_sfnt_off00008da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA4 16084 bytes
SHA-256: ce90dcb8f80a691a226d66d7b9fb40db13b52946125f6d312f8860abae454107

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