Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7887fbbbce64ac8…

MALICIOUS

PDF

44.2 KB Created: 2020-09-19 13:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: abaa4c339e9f188044ed0592580c693d SHA-1: 13bfeba546c197e8818166694a0f7c5ec6fe8d6a SHA-256: b7887fbbbce64ac867d89c99780a40803aa137179496b1017fe5faf4ff18502b
184 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The link leads to a URL that is known to be malicious. The file also contains a large number of embedded links, many of which point to benign content, suggesting a link farm or SEO poisoning tactic. The ML classifier also flagged this PDF with high confidence.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.link/wix?keyword=goblin+slayer+light+novel+volume+6+epub In PDF document text
    • http://files.alvareztyping.com/uploads/1/3/0/7/130738933/mavidisomexu.pdfIn PDF document text
    • http://daxabax.kangenwater-detox.be/uploads/1/3/2/3/132303168/154bcb11cb0b.pdfIn PDF document text
    • http://files.julielordsart.net/uploads/1/3/1/6/131606537/5158181.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5f67cba1-ec1b-46a6-8093-66ec4812c446.filesusr.com/ugd/d17951_68a7bb22f7444afb9f6b7c6b3956d9be.pdf?index=trueIn PDF document text
    • https://d0ab436f-3c52-497b-8d5a-0f3049698ef3.filesusr.com/ugd/2f3ac6_f64a8ded988b45c48318b31d067d2d82.pdf?index=trueIn PDF document text
    • https://586495d5-fd06-4a6a-9d99-c0391410e3d6.filesusr.com/ugd/7c41c1_b93a01db7b6a4446b765cdb036dc2604.pdf?index=trueIn PDF document text
    • https://655323c8-ab46-4385-95b9-59783d2bd9cd.filesusr.com/ugd/b81754_c57d0dd3506342f1b1e4c061e54db4b5.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6731/8167/files/18744631698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7052/9436/files/context_clues_worksheets_second_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3399/2085/files/carnatic_music_tamil_book.pdfIn PDF document text
    • https://09c23ed4-7959-444d-89ab-d38ed285a68f.filesusr.com/ugd/234f58_712ed5c60e2f4eed8dcfdca9f8b2a98a.pdf?index=trueIn PDF document text
    • https://f9ad431b-d0bc-41a4-9534-df98e13e52b9.filesusr.com/ugd/501a20_a13a346c83ed4b48a8cb8a99ce0cdb27.pdf?index=trueIn 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 2

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_off000058c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58C9 5604 bytes
SHA-256: d68e60410cbacf79cb0802fbf0dafa9b8b17ba017d5ef36d34c95eeca9b7680f
font_01_sfnt_off00006c42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C42 5720 bytes
SHA-256: 2e80d1d68b9a9580978701454e3f77af00c3398429cfef5fb5e130cc496a0ac0
font_02_sfnt_off00007f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F97 10056 bytes
SHA-256: 1506a673dd8135b38bc1c653a51fcc672fb103b25d4a3a37681ae745c62bac59

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