Malicious PDF — malware analysis report

Static analysis result for SHA-256 a857d6654afc6939…

MALICIOUS

PDF

50.1 KB Created: 2020-08-07 22:54:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5bcbb60efd20a02e4361d5ff9a0fd2d8 SHA-1: 88fc6e8ef51334c846d74f8256fed974c68fcdcf SHA-256: a857d6654afc6939194660ddf70423fce69a802674e3043e7949f993a679b766
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the primary malicious URL: https://ttraff.cc/wb?keyword=d&d%20tales%20from%20the%20yawning%20portal%20pdf%20download. This URL is presented as a download link for a PDF, likely to lure users into clicking and being redirected to a malicious site. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to improve search engine visibility for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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/wb?keyword=d&d%20tales%20from%20the%20yawning%20portal%20pdf%20download In PDF document text
    • http://files.theloadeddie.com/uploads/1/3/0/8/130874222/6219473.pdfIn PDF document text
    • http://files.shopcedarcreekgallery.com/uploads/1/3/1/6/131606331/8bf621b4.pdfIn PDF document text
    • http://vokuduj.anthonyweitz.com/uploads/1/3/1/8/131872055/zixinizulujote.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0444/6171/9719/files/savannah_tv_schedule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8164/5736/files/10949685177.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7439/6058/files/niduforudabapilora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6879/2732/files/visijilinejudori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1895/6448/files/how_to_register_staruml.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/88310195196.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4763/2548/files/16873474370.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/91800866049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6559/7342/files/convert_to_word_macbook_air.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7433/8454/files/fujamoni.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D77 6648 bytes
SHA-256: 2c58ca2d745235afd32d3b856988b3dee2b1ddbff4c8ba54cb8a43a429d865db
font_01_sfnt_off00005e22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E22 3484 bytes
SHA-256: b6bc3e761eca8ae26333d0367913862b9788f7109bed8a3dd2635371d897bba1
font_02_sfnt_off0000698e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x698E 15144 bytes
SHA-256: a2e68acc97bf3b56e180687cf3f6b4d61bf88fe03a7d8e3786fcddd8c0f6e470
font_03_sfnt_off00009708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9708 16192 bytes
SHA-256: 85f1098dce820298d6694a83be566ba5f9dbfe3f130eb0578a82dc8e98201313
font_04_sfnt_off0000ac44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC44 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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