Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f4e8df75d40d533…

MALICIOUS

PDF

47.5 KB Created: 2020-09-21 04:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7ca869f46ebcf1f19282334737175682 SHA-1: 70b42e982bfa791a6a0cd791e625da5bdc5c3abe SHA-256: 7f4e8df75d40d53331e12e90ee600fe83ca7bd8db023247ffb53c75288fd3683
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file functions as a link farm, directing users to numerous external websites, including a known malicious redirector. The document body contains a deceptive link, "chapter 13 chemistry answers", intended to entice clicks. The presence of multiple PDF links hosted on disposable domains suggests an attempt 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.
  • 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=chapter+13+chemistry+answers In PDF document text
    • http://files.chairssite.com/uploads/1/3/1/4/131406849/debawomuwi_xireruxuv_zalidadisuzex.pdfIn PDF document text
    • http://files.offthegrid24.com/uploads/1/3/0/7/130739718/fefapi.pdfIn PDF document text
    • http://files.beautifuldefect.com/uploads/1/3/1/1/131163872/ruvuradopadol-pedamaxud.pdfIn PDF document text
    • http://jegoj.humanitiesladder.org/uploads/1/3/1/6/131606197/06d04885.pdfIn PDF document text
    • http://perir.virtualracesusa.com/uploads/1/3/0/8/130814328/gizureburibogat-pugigazarako-diwokov-detawomarezo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e0e900c1-bc2c-4389-8026-c416c660bad3.filesusr.com/ugd/a2d007_e0d01654ef6d4b719fb4e4e325d7762c.pdf?index=trueIn PDF document text
    • https://d58e746e-8bf2-4348-9b29-8006837f3a6a.filesusr.com/ugd/0182ef_6c6f8465d7d447bfa7f5f6c8b92b2d0e.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupenase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8924/8924/files/assetto_corsa_drift_setup_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5662/5829/files/zolumafenamiwegit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1310/2998/files/52933450580.pdfIn PDF document text
    • https://a9f07397-fe83-4b8c-9ec7-79bfdc60583b.filesusr.com/ugd/4479ed_e00c17287054485da316a2ceab533dec.pdf?index=trueIn PDF document text
    • https://b36891e6-69a7-4841-a3c3-13088212e1af.filesusr.com/ugd/9ec29b_f6bbe0261ed445c0a291a8973b316c9a.pdf?index=trueIn PDF document text
    • https://86f86c7b-8de2-4d5a-8da0-1ed6d2832a32.filesusr.com/ugd/cc089a_3ffc165d590f4ca99c951a2809777fd6.pdf?index=trueIn PDF document text
    • https://535fa157-4dd5-498a-967a-4c5de41300b4.filesusr.com/ugd/112488_ca7b1992b8594ec9bb0043bc53240265.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 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_off00007b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B1A 5456 bytes
SHA-256: 1e35f7ba74fc185e23a61414d2b0a4e93a5b0b8188039e15cae26810ef12df8c
font_01_sfnt_off00008d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D96 10516 bytes
SHA-256: 1b4cb605b827400eb5b53ad5f99f674cdaa90e5d308aeabd7369c9d0865944b9

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